What made Watkins a famous photographer?A.The exhibition at Metropolitan Museum of Art.B.T

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What made Watkins a famous photographer?

A.The exhibition at Metropolitan Museum of Art.

B.The brilliant photos of Yosemite.

C.His influence on environmental movement.

D.His winning legal cases in California.

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗