Question

1. which of the following duties of the vice president is specifically listed in the u.s. constitution?

presiding over the senate
signing laws in the presidents absence
serving as chief diplomat
becoming president if the president is impeached

Explanation:

The U.S. Constitution (Article I, Section 3) states that the Vice President shall be President of the Senate. Signing laws is the President’s duty; the Chief Diplomat role is the President’s; and while the Vice President succeeds the President in some cases, the Constitution’s succession details are more nuanced, and "presiding over the Senate" is the specifically listed duty here.

Answer:

A. presiding over the Senate