What does the U. S. Constitution give the president the exclusive power to do?

A. override a veto of a proposed law

B. Determine whether laws are constitutional

C. Nominate supreme court justices

D. Create new federal and state laws

C) Nominate Supreme Court justices

Explanation:

Letter A is incorrect as the House of Representatives and the Senate have the power to override a veto, not the president.

Letter B is incorrect because determining whether laws are constitutional or unconstitutional is the job of the judicial branch of the federal government (aka the Supreme Court).

Letter D is incorrect because the president and the legislative branch (aka Congress) have the right to create new federal laws.

This is why C is correct.