Right-handedness is overwhelmingly prevalent in humans. Among studies of laterality in nonhuman primates, Jane Goodall’s 1963 study of wild chimpanzees reported no tendency toward right-handedness, while Margaret E. Redshaw’s 1993 study of captive gorillas did. However, the latter study included only 2 individuals, and a meta-analysis of primate-laterality studies demonstrated that a minimum sample size of 176 individuals is required to be confident that a finding of population-level handedness is not mere statistical noise. The claim of right-handedness in the 1993 study should therefore be treated skeptically given that __________
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hardWhich choice most logically completes the text?
A
the sample size on which the claim is based is far below the threshold identified in the meta-analysis.
B
the apparent difference between the two studies’ results may be partly attributable to the 1963 study using a different standard to determine handedness than the 1993 study did.
C
the study that did not find right-handedness in chimpanzees was also based on an insufficient population size.
D
right-handedness does not occur frequently enough among gorillas to reliably appear in a sample of only 2 individuals.