Balancing the need for sufficient food supplies with what constitutes a manageable load to carry was undoubtedly a concern at times for many ancient hunters and gatherers, like that for modern long-distance backpackers.
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Alike that for modern long-distance backpackers
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Bas that of modern long-distance backpackers
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Cjust as modern long-distance backpackers do
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Das do modern long-distance backpackers
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Eas it is for modern long-distance backpackers
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显示答案
正确答案: E