A选项为什么不对，就因为说No吗？

NO.PZ2022120702000077问题如下Caroline runs a portfolio, whiscreens out securities with low ESG scores from the benchmark inx. She then reweights the portfolio with the remaining securities accorng to their market capitalisations. To aress tracking error, she runs a portfolio optimisation programme.Hthe tracking error issue been resolveA.No, she shoulapply a strong ESG tilt to the portfolio.B.Yes, but the portfolio is now overweight securities thcorrelate with omittesecurities.C.Yes, the removof a small portion of securities from the benchmark will not imparelative performanin the long run.Yes, this strategy generally outperforms its benchmark when the exclusecurities unrperform. Caroline管理的投资组合是从基准指数中剔除ESG得分较低的证券之后，根据剩余证券的市值重新调整权重构建的，这样她管理的投资组合和基准指数就会有较大的跟踪误差。她想通过最优化的方式解决这个问题，例如设定一个最小化tracking error的限制。但是这样会给予与被剔除证券相似的证券更高的权重，例如股票A被剔除，股票B与A相似，最优化后会给予B更高的权重。 traerror只能缓解不能解决吧？只有A说了不能解决这个问题啊

NO.PZ2022120702000077 问题如下 Caroline runs a portfolio, whiscreens out securities with low ESG scores from the benchmark inx. She then reweights the portfolio with the remaining securities accorng to their market capitalisations. To aress tracking error, she runs a portfolio optimisation programme.Hthe tracking error issue been resolve A.No, she shoulapply a strong ESG tilt to the portfolio. B.Yes, but the portfolio is now overweight securities thcorrelate with omittesecurities. C.Yes, the removof a small portion of securities from the benchmark will not imparelative performanin the long run. Yes, this strategy generally outperforms its benchmark when the exclusecurities unrperform. Caroline管理的投资组合是从基准指数中剔除ESG得分较低的证券之后，根据剩余证券的市值重新调整权重构建的，这样她管理的投资组合和基准指数就会有较大的跟踪误差。她想通过最优化的方式解决这个问题，例如设定一个最小化tracking error的限制。但是这样会给予与被剔除证券相似的证券更高的权重，例如股票A被剔除，股票B与A相似，最优化后会给予B更高的权重。 的是,“可以解决,这个策略在排除表现不佳的证券后一般来说组合的表现比benchmark好”,这个不对吗?剔除ESG不好的,用好的替代,为什么不能比benchmark要好了呢?

NO.PZ2022120702000077 问题如下 Caroline runs a portfolio, whiscreens out securities with low ESG scores from the benchmark inx. She then reweights the portfolio with the remaining securities accorng to their market capitalisations. To aress tracking error, she runs a portfolio optimisation programme.Hthe tracking error issue been resolve A.No, she shoulapply a strong ESG tilt to the portfolio. B.Yes, but the portfolio is now overweight securities thcorrelate with omittesecurities. C.Yes, the removof a small portion of securities from the benchmark will not imparelative performanin the long run. Yes, this strategy generally outperforms its benchmark when the exclusecurities unrperform. Caroline管理的投资组合是从基准指数中剔除ESG得分较低的证券之后，根据剩余证券的市值重新调整权重构建的，这样她管理的投资组合和基准指数就会有较大的跟踪误差。她想通过最优化的方式解决这个问题，例如设定一个最小化tracking error的限制。但是这样会给予与被剔除证券相似的证券更高的权重，例如股票A被剔除，股票B与A相似，最优化后会给予B更高的权重。 难道portfolio optimisation programme就是专门特指的剔除了一些股票，然后就拿跟这些股票相近的来替代么这一个操作办法么？

NO.PZ2022120702000077 问题如下 Caroline runs a portfolio, whiscreens out securities with low ESG scores from the benchmark inx. She then reweights the portfolio with the remaining securities accorng to their market capitalisations. To aress tracking error, she runs a portfolio optimisation programme.Hthe tracking error issue been resolve A.No, she shoulapply a strong ESG tilt to the portfolio. B.Yes, but the portfolio is now overweight securities thcorrelate with omittesecurities. C.Yes, the removof a small portion of securities from the benchmark will not imparelative performanin the long run. Yes, this strategy generally outperforms its benchmark when the exclusecurities unrperform. Caroline管理的投资组合是从基准指数中剔除ESG得分较低的证券之后，根据剩余证券的市值重新调整权重构建的，这样她管理的投资组合和基准指数就会有较大的跟踪误差。她想通过最优化的方式解决这个问题，例如设定一个最小化tracking error的限制。但是这样会给予与被剔除证券相似的证券更高的权重，例如股票A被剔除，股票B与A相似，最优化后会给予B更高的权重。 请下题干的表述，并回答一下怎么就解决了tracking error的问题了？另外再一下B和个

NO.PZ2022120702000077问题如下 Caroline runs a portfolio, whiscreens out securities with low ESG scores from the benchmark inx. She then reweights the portfolio with the remaining securities accorng to their market capitalisations. To aress tracking error, she runs a portfolio optimisation programme.Hthe tracking error issue been resolveA.No, she shoulapply a strong ESG tilt to the portfolio.B.Yes, but the portfolio is now overweight securities thcorrelate with omittesecurities.C.Yes, the removof a small portion of securities from the benchmark will not imparelative performanin the long run.Yes, this strategy generally outperforms its benchmark when the exclusecurities unrperform. Caroline管理的投资组合是从基准指数中剔除ESG得分较低的证券之后，根据剩余证券的市值重新调整权重构建的，这样她管理的投资组合和基准指数就会有较大的跟踪误差。她想通过最优化的方式解决这个问题，例如设定一个最小化tracking error的限制。但是这样会给予与被剔除证券相似的证券更高的权重，例如股票A被剔除，股票B与A相似，最优化后会给予B更高的权重。 老师，我理解实际上并没有解决这个tracking error 只是优化了，但resolve是解决的意思，这个答案是不是歧义呢？另外，这个tracking error是越小越好吗？