Janie must choose to either mow the lawn or wash clothes. If she mows the lawn, she will earn $30, and if she washes clothes, she will earn $45. She dislikes both tasks equally and they both take the same amount of time. Janie will therefore choose to _ because it generates a _ economic surplus.

A.mow the lawn; bigger

B.mow the law; smaller

C.wash clothes; smaller

D.wash clothes; bigger

正确答案：wash clothes; bigger