In General, the Effectiveness of Congressional Oversight of the Executive

In general, the effectiveness of congressional oversight of the executive branch

A) is strong, as the Supreme Court has affirmed the legislature's authority to exercise such powers as the legislative veto.
B) often depends on the cooperation of the president being overseen.
C) is strong because it is a power enumerated by the Constitution.
D) is weak, because Congress has no power over the budget of executive agencies.
E) is weak, because Congress has no recognized authority to change executive agency regulations.