Who would be in greatest need a folate supplementation?

A. A light skinned woman living in a low UV environment, who is trying to start a family
B. A dark skinned woman living in a low UV environment and trying to start a family
C. A light skinned woman living in a high UV environment who is trying to start a family
D. A dark skin man living in a low UV environment
E. A light skinned man living in a high UV environment