A、Because human beings are powerful enough to kill one another. B、Because every species will become extinct by natural selection

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问题

选项 A、Because human beings are powerful enough to kill one another.
B、Because every species will become extinct by natural selection.
C、Because there is over-population that will make the earth explode.
D、Because human beings are a young species exploiting their environment.

答案D

解析
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