Homologous structures can be used to tell a wide variety of information. Which of the following statements would be supported be the differences in the arrangement of the bones in the forelimbs of the human, whale, dog, and bat seen above?

A
They descended from the same recent ancestor

B
They live in the same environmental conditions

C
They contain the same genetic information

D
They possess adaptations needed for their specific environment

A. They descended from the same recent ancestor