Which statement is an example of a metaphor? A. she is an uncaring person. B. shw was as busy as a bee. C. his room was like a prison. D. she has a heart of a stone.

A metaphor is a comparison without using like or as. So we can already cross out B and C. So between A and D we can see that A is more of a direct statement. There is no comparison happening so letter D. would most likely be the answer.