What powers are given to the states in elections that have caused and under representation for certain voting populations?

A) States are allowed to decide who can vote.
B) States put heavy voter D restrictions on all voters.
C) States decide where polling locations will be and what languages voting material is printed in.
D) States can deny mail- in ballot options for specific voting populations.

C) States decide where polling locations will be and what languages voting material is printed in.