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

Aconservatives
Bextremists
Cmoderates
Dliberals

Verified Answer :

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

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