这题。。。咋一点都不会呢

NO.PZ2020012201000010问题如下 Sara Izek anAm Berke are members of the asset allocation committee Cycle Point Aisors, whiemphasizes the business cycle within its tacticasset allocation process.Berke hvelopea time series mol of the business cycle thuses a publisheLEI series a key input. He presents forecasts baseon the mol eaasset allocation meeting.Izek is eclectic in her approach, preferring to sample researfrom a wi variety of sourseamonth anthen focus on whatever perspectives anresults seem most interesting. She usually brings a staof charts she hcopieto the asset allocation meeting.Whiof the main forecasting approaches (or combination of approaches) best scribe(s) eaanalyst’s own practice? A.Izek’s practiis essentially a LEI approach.B.Both Izek anBerke uses the econometric moling approain conjunction with the LEI approach.C.Berke uses the econometric moling approain conjunction with the LEI approach. C is correct.Berke 用的 time series mol 属于econometric moling approach范畴，同时他还用了 publisheLEI series 作为关键变量，所以也结合了LEI approa而Izek喜欢每个月从各种各样的资源中选取研究样本，然后专注于最有趣的观点和结果，其中还包含了很多图和表。这是checklist approach. C为什么正确？哪里能看出结合了LEI approach？

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NO.PZ2020012201000010 问题如下 Sara Izek anAm Berke are members of the asset allocation committee Cycle Point Aisors, whiemphasizes the business cycle within its tacticasset allocation process.Berke hvelopea time series mol of the business cycle thuses a publisheLEI series a key input. He presents forecasts baseon the mol eaasset allocation meeting.Izek is eclectic in her approach, preferring to sample researfrom a wi variety of sourseamonth anthen focus on whatever perspectives anresults seem most interesting. She usually brings a staof charts she hcopieto the asset allocation meeting.Whiof the main forecasting approaches (or combination of approaches) best scribe(s) eaanalyst’s own practice? A.Izek’s practiis essentially a LEI approach. B.Both Izek anBerke uses the econometric moling approain conjunction with the LEI approach. C.Berke uses the econometric moling approain conjunction with the LEI approach. C is correct.Berke 用的 time series mol 属于econometric moling approach范畴，同时他还用了 publisheLEI series 作为关键变量，所以也结合了LEI approa而Izek喜欢每个月从各种各样的资源中选取研究样本，然后专注于最有趣的观点和结果，其中还包含了很多图和表。这是checklist approach. 理解1Berke用了 time series mol 所以是先是moling的方法，同时LEI因为是incator指标，所以还结合了incator的方法理解2Izek从资源中抽取样本，这个属于incator的方法，但为什么还包括checklist的方法？请问我的理解1是否正确，再一下理解2的问题

NO.PZ2020012201000010 问题如下 Sara IzekanAm Berke are members of the asset allocation committee Cycle Point Aisors, whiemphasizes the business cycle within its tacticasset allocation process.Berke hvelopea time series mol of the business cycle thuses a publisheLEI series a key input. He presents forecasts baseon the mol eaasset allocation meeting.Izek is eclectic in her approach, preferring to sample researfrom a wi variety of sourseamonth anthen focus on whatever perspectives anresults seem most interesting. She usually brings a staof charts she hcopieto the asset allocation meeting.Whiof the main forecasting approaches (or combination of approaches) best scribe(s) eaanalyst’s own practice? A.Izek’s practiis essentially a LEI approach. B.Both Izek anBerke uses the econometric moling approain conjunction with the LEI approach. C.Berke uses the econometric moling approain conjunction with the LEI approach. C is correct.Berke 用的 time series mol 属于econometric moling approach范畴，同时他还用了 publisheLEI series 作为关键变量，所以也结合了LEI approa而Izek喜欢每个月从各种各样的资源中选取研究样本，然后专注于最有趣的观点和结果，其中还包含了很多图和表。这是checklist approach. 如题