求助 一题

Temporary employment agencies benefit not only from the imcreasing demand for clerical workers but also the higher profits made when highly paid professionals are placed, requests for whom have increased in the recent wave of corporate takeovers.

 (C) from the requests for highly paid professionals who make higher profits for the agencies when placed and whose requests

( D) from highly paid professionals, whose placement makes higher profits for the agencies and whose requests

( E) from the higher profits made in placing highly paid professionals, requests for whom

为什么D不对？答案是E，

最后一个分句充当什么成分？

whose request不对

题目的意思是对 professionals的需求,不是professionals的需求,因此用request for whom

最后一个分句就是修饰professionals的