settlement包括了clearing 为什么A会错呢

NO.PZ2021061002000003 问题如下 Whiofthe following is appropriate statement regarng exchange-traerivatives markets? A.Settlement: the process whithe exchange verifies the execution of a transaction anrecor the participants’ intities. B.The clearing ansettlement process provisa cret guarantee. C.Exchange markets are more transparent thanover-the-counter markets, but not all information is requireto scloseo exchanges. B is correct清算:交易所验证交易执行并记录参与者身份的过程，并不是结算（settlement），A错交易所市场比场外交易市场具有更高的透明度，所有交易的全部信息都向交易所和监管机构披露。C错。 如题。谢谢老师。

NO.PZ2021061002000003 问题如下 Whiofthe following is appropriate statement regarng exchange-traerivatives markets? A.Settlement: the process whithe exchange verifies the execution of a transaction anrecor the participants’ intities. B.The clearing ansettlement process provisa cret guarantee. C.Exchange markets are more transparent thanover-the-counter markets, but not all information is requireto scloseo exchanges. B is correct清算:交易所验证交易执行并记录参与者身份的过程，并不是结算（settlement），A错交易所市场比场外交易市场具有更高的透明度，所有交易的全部信息都向交易所和监管机构披露。C错。 清算是算出交易的债券和资金的应收应付金额，结算包括清算和交收，还要利用清算后的数据，真正的做资金和证券的收付。那结算是啥呀，谢谢

NO.PZ2021061002000003 问题如下 Whiofthe following is appropriate statement regarng exchange-traerivatives markets? A.Settlement: the process whithe exchange verifies the execution of a transaction anrecor the participants’ intities. B.The clearing ansettlement process provisa cret guarantee. C.Exchange markets are more transparent thanover-the-counter markets, but not all information is requireto scloseo exchanges. B is correct清算:交易所验证交易执行并记录参与者身份的过程，并不是结算（settlement），A错交易所市场比场外交易市场具有更高的透明度，所有交易的全部信息都向交易所和监管机构披露。C错。 清算和结算不同之处是？