问题详情

Faced with the prevalence of GM crops, organic farmers

A．have sought new certifications for their GM-free products.

B．can do nothing to stop their crops from being polluted by GM factors.

C．can get huge profits by selling their GM-free goods.

D．have done a lot to safeguard their GM-free goods.

请帮忙给出正确答案和分析，谢谢！