In addition to replacing the president if necessary, it's the duty of the vice president to
a. review laws before the president signs them.
b. serve as speaker of the house.
c. preside over the senate.
d. serve as liaison to the judicial branch.

In addition to replacing the president if necessary, it's the duty of the vice president to preside over the Senate. The correct option among all the options that are given in the question is the third option or option "C". I hope that this is the answer that has actually come to your great help.

The answer is