Use the following figure to answer the following question The figure shows a map of some small islands off the coast of Japan Biologists measured the frequencies of two alleles named Aap 2a and Aap 2b in 9 different populations of the plant Suzukia luchuensis on various islands Each circle is a pie chart reflecting the frequency of the two alleles on that island An entirely dark circle would indicate that the population has a frequency of the Aap 2a allele 1 0 while an entire light circle would indicate an allele frequency of Aap 2b 1 0 A circle with frequencies of both alleles 0 5 would be half black etc For the questions that follow the islands are placed in three groups A five black circles B two white circles and C two black circles Assume for the sake of these questions that all three genotypes have equal fitness on all of the islands and that the population sizes on each island are large Group A 24 Group B Aap 2b Aap 2a Group C Additional sampling indicates that allele frequencies for thirteen other genes are identical among populations on all of the islands in Group A Which of the following statements is likely to be true based on the evidence Natural selection is stronger on some of these islands than others O There is migration occurring between the islands of Group A Genetic drift has independently resulted in fixation of Aap 2a on each island The water gap is preventing migration between islands