Final answer:
The nomination of twenty women senators is done by the Vice President.
Step-by-step explanation:
The correct answer is d. The Vice President. The Constitution outlines that the Vice President serves as the President of the Senate. While the President does play a role in nominating Supreme Court justices, the nomination of women senators is not specifically mentioned in the Constitution, and the President does not have the authority to directly nominate senators. Instead, senators are elected by voters in each state.