能解释下c的知识点吗

NO.PZ2023052301000086问题如下 The inclusion of assets into a CLO collaterpool is complete A.ring a subsequent ramp-up perioB.prior to the close of the CLO transaction.C.between ramp-up anlomaturity on meeting certain requirements. The correanswer is After the ramp-up periobut before unrlying collaterpool loans mature, the collatermanager mreplaloans in the portfolio long the new asset meets the portfolio selection criteriA is incorrebecause while aitionassets are aeto the collaterpool ring a subsequent ramp-up perio loreplacements cstill occur after the ramp-up perio B is incorrebecause a typicfeature of CLO transactions is ththe collaterportfolio is not finalizeuntil after the transaction closes. 是我翻译不对吗？我理解标题这句话的意思是在交易关闭之前，和until transaction close是一样的意思呀，所以我才选的B。C里面跟贷款到期有什么关系，明显不对。

NO.PZ2023052301000086 问题如下 The inclusion of assets into a CLO collaterpool is complete A.ring a subsequent ramp-up perio B.prior to the close of the CLO transaction. C.between ramp-up anlomaturity on meeting certain requirements. The correanswer is After the ramp-up periobut before unrlying collaterpool loans mature, the collatermanager mreplaloans in the portfolio long the new asset meets the portfolio selection criteriA is incorrebecause while aitionassets are aeto the collaterpool ring a subsequent ramp-up perio loreplacements cstill occur after the ramp-up perio B is incorrebecause a typicfeature of CLO transactions is ththe collaterportfolio is not finalizeuntil after the transaction closes. 我理解的CLO 里面构建的collaterpool 资产是应该从warehouse perioreinvestmentperio C是不是不够严谨，只是相对AB来说更准确一些？