Although the Veto Is One of the President's Most Formidable

Although the veto is one of the president's most formidable powers, recent presidents have rarely used it.This is likely because:

A) the minimal use reflects the presidential turn toward the use of management tools, rather than legislative tools, in getting things done.
B) the mere threat of a veto is often enough to make legislators alter a bill's content.
C) members of Congress have, in more politically polarized times, engaged in obstructionist behavior, leading executives to propose fewer policies.
D) one party almost always controls both chambers of Congress and the presidency, so vetoes are rarely necessary.