|Question 13Verbal

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Humans are overwhelmingly right-hand dominant (85–90%) and can thus be said to exhibit strong population-level right handedness (PLRH). Among studies of nonhuman primates, Margaret E. Redshaw's 1993 study of captive gorillas purported to show PLRH, while Jane Goodall's 1963 study of wild chimpanzees did not. Overall, the studies claiming PLRH in nonhuman primates find much lower incidences of right-handedness than humans exhibit, but it's worth noting that studies of captive primates tend to show significantly greater incidences of right-handedness than studies of wild primates do, therefore raising the possibility that _____
Which choice most logically completes the text?
the number of individuals in the study of wild chimpanzees is insufficient to preclude the claim that nonhuman primates exhibit PLRH.
A
the number of individuals in the study of captive gorillas is insufficient for a robust claim regarding evidence of PLRH.
B
the greater exposure to humans among the captive gorillas induced them to acquire more right-handed behaviors.
C
the apparent discrepancy between the studies' results may be partly attributable to the 1963 study using different criteria when assessing hand dominance than were used in the 1993 study.
D