The growth of independent voters since the 1960s has had what result on political parties?
A) Political parties have not changed because of the growth of moderates.
B) Political parties have used interest groups to persuade moderate voters to their policy positions.
C) Political parties have allowed primary voters to shape the structure and functions of the party through primary elections.
D)Political parties do not worry about the growth of moderate voters as evidence of the extreme polarization in our society today.