In addition to replacing the president if necessary, it's the duty of the vice president to

Areview laws before the president signs them.
Bserve as Speaker of the House.
Cpreside over the Senate.
Dserve as liaison to the judicial branch.

Verified Answer :

Hagrid

In addition to replacing the president if necessary, it's the duty of the vice president to

C. preside over the Senate

This is according to the US Constitution. The vice president can also be appointed as member of the Cabinet if decided by the president.

its C preside over the senate