单选题：Paragraph 3________.

题目内容：

Paragraph 3________. A．Provide Clean Water
B．Dig 0il Wells
C．Save Clean Water
D．Don't Litter
E．Don't Be Crude
F．Protect Wildlife

参考答案：【答案仅供学习，请勿对照自行用药等】

答案解析：

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