What is Luca Cavalli-Sforza's hypothesis for why skin color change came late?
A)Fewer people in the past meant less genetic variability.
B)Earlier populations had ready access to vitamin D from the foods they ate.
C)The Sun was not as powerful as it is today.
D)People were still migrating from a cold,cloudy environment to a sunny environment.

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Luca Cavalli-Sforza's hypothesis for why skin color change came late is that earlier populations had ready access to vitamin D from the foods they ate, thus negating the need for lighter skin to absorb vitamin D from sunlight.

What Is Luca Cavalli-Sforza's Hypothesis for Why Skin Color Change