What does the following figure illustrate? (Each dot represents a pair of Drosophila species)
A. The strength of prezygotic isolation increases more rapidly between sympatric pairs of species than it does between allopatric pairs
B. Drosophila species are more likely to diverge in sympatric distributions
C. Genetic distance is greater in allopatrically speciating lineages
D. Reinforcement of genetic reproductive isolation is more of a factor in speciation between allopatric than sympatric pairs
Answer: A. The strength of prezygotic isolation increases more rapidly between sympatric pairs of species than it does between allopatric pairs
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