问题详情

Which one of the following best expresses the main idea of the passage？

A．The reduction in biodiversity represents a setback both for science and for society as a whole.

B．The material and cultural wealth of a nation are insignificant when compared with the country"s biological wealth.

C．The human species is in the process of initiating an unprecedented massive extinction episode.

D．The current decline in species diversity has potentially grave consequences for the human species.

请帮忙给出正确答案和分析，谢谢！