Which of the Following Is Not an Advantage of Decentralisation

Which of the following is not an advantage of decentralisation?

A) It often creates higher job satisfaction for managers.
B) It allows top-level managers more time to devote to long-range strategic planning.
C) It allows lower-level managers to focus on their own particular goals and objectives without having to consider the overall company's goals and objectives.
D) It permits lower-level managers to gain valuable on-the-job training in order to become better managers.