A．To fly one following another.B．To fly without stopping.C．To use land features as the
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A．To fly one following another.
B．To fly without stopping.
C．To use land features as the guide.
D．To take one route only.
请帮忙给出正确答案和分析，谢谢！
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正确答案：C
解析：此题的问题是：“What is the most straightforward method for the birds to use to find their way?”由于文中根本未提到A、B、D，则可用排除法直接选定C为答案。