题目信息
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.
A:like that for modern long-distance backpackers
B:as that of modern long-distance backpackers
C:just as modern long-distance backpackers do
D:as do modern long-distance backpackers
E:as it is for modern long-distance backpackers
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E:as it is for modern long-distance backpackers
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