The Bones That Make Up the Forelimbs of Monkeys, Cats

The bones that make up the forelimbs of monkeys, cats, whales, and birds are similar. Which of the following statements best supports the evolutionary relationship of these animals?

A) The animals have different ancestries but have adapted to similar environments.
B) The animals share a common ancestry but have adapted to different environments.
C) The animals at one time lived in different environments but now share an environment.
D) The animals use their forelimbs for identical activities but live in different environments.