A. approves constitutional amendments
b. declares executive orders legal
c. proposes treaties
d. overrides vetoes

D. Overrides vetoes

Explanation:

In the United States, the president has the ability to veto legislation that has passed through Congress, but this right is not absolute. A qualified majority of 2/3 of both houses can pass a law, even against a presidential veto; However, if the proposed law has only more than simple, the president's veto is decisive.

the correct answer is history and tradition.