Exogamy Is Adaptive Because It

Exogamy is adaptive because it

A) increases the number of individuals that one can rely on in times of need.
B) increases the likelihood that disadvantageous alleles will find phenotypic expression and eliminate them from the population.
C) impedes peaceful relations among social groups and therefore promotes population expansion.
D) was an important causal factor in the origin of the state.
E) reduces the gene pool of a community.