[讨论]og90

90.   Since 1986, when the Department of Labor began to allow investment officers’ fees to be based on how the funds they manage perform, several corporations began paying their investment advisers a small basic fee, with a contract promising higher fees if the managers perform well.

(A) investment officers’ fees to be based on how the funds they manage perform, several corporations began

(B) investment officers’ fees to be based on the performance of the funds they manage, several corporations began

(C) that fees of investment officers be based on how the funds they manage perform, several corporations have begun

(D) fees of investment officers to be based on the performance of the funds they manage, several corporations have begun（D）

(E) that investment officers’ fees be based on the performance of the funds they manage, several corporations began

突然觉得：manage 是不是应该用过去时态修饰funds?这个问题在讨论帖中没有发现，可能是太傻了，但仍渴望诸位的帮助

句子的主句是现在完成时, 过去时怎么能与现在时并列, 除非有特别的时间提示. 而这句句子里陈述的是一直延续到现在的情况, 所以用过去时不对.

我所说的并列是指并列出现的意思.

when began to allow用过去时是因为when begin与前面的1986决定了一定要用过去时began. 而整个句子的基调是强调一个过去延续到现在的情况, 所以manage要用现在时, 与主句的现在时对应.