.
Which statement best expresses the central idea in the article?

A
Scientists have discovered a way to prevent genetic defects in babies, but some believe genetic development should be left to nature
B
Scientists have discovered a way to prevent genetic defects in babies, but some worry that the process could be used for great economic gain
C
Scientists have discovered a way to prevent genetic defects in babies, but the method is against many families’ religions
D
Scientists have discovered a way to prevent genetic defects in babies, but the process is still very risky

The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the correspondingbones in whales have very different shapes and proportions. however, genetic data suggest that all three kindsof organisms diverged from a common ancestor at about the same time. which of the following is the mostlikely explanation for these data? a) humans and bats evolved by natural selection, and whales evolved by lamarckian mechanisms. b) forelimb evolution was adaptive in people and bats, but not in whales. c) natural selection in an aquatic environment resulted in significant changes to whale forelimb anatomy. d) genes mutate faster in whales than in humans or bats. e) whales are not properly classified as mammals.