15. Bipedalism freed the hands, which allowed tools to be carried. Why was this an advantage?
A) The tools could be used as weapons against predators, if necessary.
B) The tools could be used to intimidate rival males.
C) Carrying tools built up the primates’ arms for more strength.
D) Carrying tools improved the development of hand-eye coordination.
A) The tools could be used as weapons against predators, if necessary.
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