Which of the Following Is an Advantage of Decentralization

Which of the following is an advantage of decentralization?

A) It allows top-level management who normally work at corporate headquarters to get involved with the day-to-day decisions that need to be made at lower levels.
B) It allows managers to focus on their own area of responsibility rather than what is best for the company as a whole.
C) It allows decisions to be made in a more timely manner.
D) It requires very little as far as manager training costs.