Temporary-employment agencies benefit not only from the increasing 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. (E )
A the higher profits made when highly paid professionals are placed, requests for whom
B the higher profits that are made in the placement of highly paid professionals , requests for whom
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
根据not only from ,but also from，排除A B
D 中，Not only from the increasing demand （抽象名词），but also from highly paid professionals(具体名词)， 排除
C 中，Not only from the increasing demand （抽象名词），but also from the requests(抽象名词),可以并列，who 引导的从句中，是不是这个when placed 有问题呢？
E 中，requests for whom have increased in the recent wave of corporate takeovers这个句子做什么成份阿？
