Forest lives in complete isolation in Montana. He is self-sufficient and feeds himself through hunting, fishing, and farming. Which of the following statements about Forest is true?

A.Forest is not required to make trade-offs because he is self-sufficient.

B.Forest has unlimited resources.

C.Forest doesn’t have to consider costs and benefits.

D.Forest has to make trade-offs.

正确答案：Forest has to make trade-offs.