On Planet X, Some Areas Receive Very Little Ultraviolet Radiation

On Planet X, some areas receive very little ultraviolet radiation (UVR) .What skin color would you expect the people of Planet X to have if they live in those areas?

A) always light
B) always dark
C) light unless their diet contains a lot of Vitamin D
D) dark unless their diet contains a lot of Vitamin D
E) light unless their diet contains a lot of Vitamin A