单选题
Which of the following best summarizes the text?
A、
As the UN hesitates, the poor take action.
B、
Progress in environmental protection has been made since the Rio Summit.
C、
Climate changes can no longer be neglected.
D、
The decline of earth's life-support systems has been halted.
【正确答案】
A
【答案解析】
[解析]由全文看，作者在讲述一种观点：当联合国(UN)犹豫不决时，第三世界已经采取了行动。故应选A。
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