单选题：Why did the authorities can't rescue these villagers?

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题目内容：
Why did the authorities can't rescue these villagers? A．Because the authorities didn't receive any calls.
B．Because the authorities would cost too much and they didn't want to helpthese villagers
C．Because the villagers needn't other's help.
D．Because numerous towns and villages were flooded with no road access.

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答案解析：

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