Answer: D
Step-by-step explanation:
According to Quizlet, D is the answer. To confirm, A doesn't make sense, that shouldn't hurt anyone. B also doesn't make sense, a little more Vitamin D would not hurt anyone. The mutation one must be wrong because a mutation specific to Asian people would have popped up a long time ago, not now with such a diverse global population experiencing many of the same things at the same times.