Which of the Following Is the Primary Advantage of Bottom-Up

Which of the following is the primary advantage of bottom-up planning?

A) Bottom-up planning is the favorite of Fortune 500 firms.
B) Bottom-up planning permits the top managers of the firm, who presumably are most knowledgeable about the company as a whole, drive the planning process.
C) Bottom-up planning permits the employees who are closest to the customer, supplier, and operating system to drive the planning process.
D) Bottom-up planning is the least expensive of the various approaches to planning.
E) Bottom-up planning avoids the need to develop a participatory work environment.