Question

The two major political parties in the United States compete the most with one another for the votes of

A. conservatives
B. extremists
C. moderates
D. liberals

Answer 1

It's Moderates :) This is the best answer do some research if you don't understand 

Answer 2

The two major political parties in the United States that are Democrats and the Republicans compete the most with one another for the votes of
moderates
because moderates are the people or an individual that is not extreme nor radical
so correct option i conclude is C
hope it helps