Final answer:
Centralization in an organization refers to the concentration of authority at the top of the managerial hierarchy. This means key decisions are made by top-level managers or executives.
Step-by-step explanation:
Centralization in an organization refers to the concentration of authority at the top of the managerial hierarchy. Option A is true of centralization. It means that key decisions are made by top-level managers or executives. This can lead to a more streamlined decision-making process and a clear chain of command.