The one factor that company executives need not worry about when their company is managing many diverse, unrelated firms is
a. knowing what to do if a business unit stumbles.
b. staying abreast of what's happening in each industry and subsidiary.
c. managing by the numbers"—that is, keeping a close track on the financial and operating results of each subsidiary.
d. picking business-unit heads who have the requisite combination of managerial skills and know-how to motivate people.
e. understanding the true value of strategic investment proposals by business-unit managers.