20. The upper forelimbs of humans and bats have fairly similarskeletal structures,very different sl shapes and proports, whereas the corr responding bones in whales havetions. However, genetic data su data suggestthat all three kinds of o forganisms div verged from a common ancestorat about the same time. Which of the following is the most likelyexplanation for these data?
(A) Forelimb evolution was adaptive in people and bats, but notin whales
(B) Natural selection in an aquatic environment resulted insignificant changes to whale forelimb anatomy
(C)Genes mutate faster in whales than in humans or bats
(D) Whales are not properly classified as mammals