大全493

4.     Lower-level management function most effectively when they have thorough training and unimpeded communication with workers, supervisors, and one another.

(A) management function most effectively when they have

(B) managers function most effectively when they have

(C) management functions most effectively when they have

(D) managers function most effectively when they have received（B）

(E) management functions most effectively when it has

E为何不对? 不明白. 语法上应该没有错误.

sorry,sorry 刚刚查到这题有一个链接http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=54099.

What's wrong with Choice A? management 不是有“管理人员”的意思吗？