It is his duty to find out quickly some solutions to deal with the biggest problem of the world. It's pollution.

A. It's his duty to be found out quickly some solutions to deal with the biggest problem of the world. It's pollution

B. He was founded out quickly some solutions to deal with the biggest problem of the world. It's pollution.

C. He is supposed to find out quickly some solutions to deal with the biggest problem of the world pollution.

D. The biggest problem of the world was founded by him. It's pollution.

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