What is the writer‘s attitude to GM foods？ 查看材料A.He

What is the writer‘s attitude to GM foods？ 查看材料

A.He thinks their benefits and risks are balanced.

B.He thinks their risks outweigh their benefits.

C.He thinks their benefits outweigh their risks.

D.We cannot tell from the passage.

请帮忙给出正确答案和分析，谢谢！