Selection for Two Different Alleles of the Hypoxia Inducible Factor

Multiple Choice

Selection for two different alleles of the hypoxia inducible factor pathway gene (EPAS1) , one in Tibetan and the other in Ethiopian populations suggests that these two population share what?

A) selective pressure related to altitude
B) recent common ancestry
C) selective pressure for high gene expression
D) This result suggests that these two populations have nothing in common.
E) no common ancestry