Humans have a very strong bias toward right-handedness, with approximately 85-90% having right as their dominant hand. Among studies of nonhuman primates, James Welles’s 1976 study of captive chimpanzees and catarrhine monkeys reported more right-handed individuals than left-handed ones, but William C. McGrew and colleagues’ 1999 study of wild chimpanzees did not find a tendency toward right-handedness. It’s important to note, however, that captive animals spend significantly more time with humans than wild animals do, and therefore __________
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mediumWhich choice most logically completes the text?
A
the apparent difference between the two studies’ results may be partly attributable to the 1976 study using a different standard to determine handedness than the 1999 study did.
B
the right-handedness exhibited by the captive chimpanzees and catarrhine monkeys might be, in part, an effect of extended contact with humans.
C
the number of individuals in the study of captive chimpanzees and catarrhine monkeys is likely too small to support the claim that the species tends toward right-handedness.
D
the number of individuals in the study of wild chimpanzees is probably too small to support the claim that no tendency toward right-handedness was found in that population.