The One Factor That Company Executives Need Not Worry About

The one factor that company executives need not worry about when their company is managing many diverse,unrelated firms is

A) staying abreast of what is happening in each industry and subsidiary.
B) picking business-unit heads who have the requisite combination of managerial skills and know-how to motivate people.
C) understanding the true value of strategic investment proposals by business-unit managers.
D) knowing what to do if a business unit stumbles.
E) "managing by the numbers"-that is,keeping a close track on the financial and operating results of each subsidiary.