Refer to the Figure Below, Which Shows the Mean Area

Refer to the figure below, which shows the mean area of comb produced in colonies of a polyandrous bee species. In bees, the comb in the hive is where offspring are reared and food is stored.
While some members of the genus Apis are highly polyandrous, most other bee species are not. These results suggest that polyandry evolved in this genus because

A) females receive genetic benefits in terms of improved offspring viability by mating multiply.
B) increased hive diversity increases productivity of the hive because of a varied workforce.
C) increased genetic diversity enhances disease or parasite resistance.
D) by mating multiply, females can avoid inbreeding, which would create less heterozygous offspring.