Question ID:PT22 S2 Q22 Passage:Biologist:  Some speculate that the unusually high frequency of small goats found in island populations is a response to evolutionary pressure to increase the number of goats so as to ensure a diverse gene pool. However, only the reproductive success of a trait influences its frequency in a population.  So, the only kind of evolutionary pressure that can reduce the average size of the members of a goat population is that resulting from small goats achieving greater reproductive success than their larger cousins.  Stem:The biologist's view, if true, provides the most support for which one of the following? Correct Answer Choice:DChoice A:The evolutionary pressure to ensure a diverse gene pool could have the effect of increasing the frequency of a gene for small size. Choice B:The unusual frequency of small goats in island populations is not a result of the greater reproductive success small goats possess when space is limited. Choice C:Contrary to what some believe, large goats achieve greater reproductive success than small goats even when space is limited. Choice D:The evolutionary pressure to ensure a diverse gene pool does not have the effect of increasing the frequency of a gene for small size. Choice E:A diverse gene pool cannot be achieved in a goat population unless the average size of its members is reduced.