[求助]og90 allow that

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

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

The clause beginning Since 1986... indicates that the practice described in the second clause continued

for some period of time after it began. Choice D, the best answer, supplies the present perfect have

begun, which conveys this continuity; D also uses a construction that is appropriate when "allow"

means "permit": allow... to be based on. Choices A, B, and E incorrectly use the past tense began
                

rather than the present perfect; furthermore, in each of these options, they has no referent, since

officers is a possessive modifier of fees. Choices A and C include the awkward phrase based on how

the funds they manage perform.
                    Choices C and E incorrectly use allow that.. .fees be based.

KEY

请教＜C＞，allow that fees of investment officers be based on
                    是怎么错了呢？allow不能加that从句，还是虚拟语气

不对？

太感谢了！