Final answer:
The real leadership in the Senate rests with the Senate Majority Leader and the Senate Minority Leader.
Step-by-step explanation:
The real leadership in the Senate rests with the Senate Majority Leader (option A) and the Senate Minority Leader (option D).
The majority leader is the chief spokesperson for the majority party in the Senate and holds significant power. They are responsible for running the floor and working with the minority leader to ensure cooperation and get things done.
On the other hand, the vice president (option C) is the president of the Senate according to the U.S. Constitution, but their role is largely ceremonial and they can only vote in case of a tie.