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Sifakas are among a short list of primates other than humans known to display a preference for using one hand rather than the other. Significantly more Sifakas are left-handed than are right-handed. Since infant Sifakas engage in much imitative behavior, researchers hypothesize that it is by imitation that infant Sifakas learn which hand to use, so that offspring reared by left-handed parents generally share their parents' handedness.
Which one of the following, if true, most supports the researchers' hypothesis?
A) A study conducted on adult Sifakas revealed that many were right-handed
B) Right-handed Sifakas virtually all have at least one sibling who is left-handed
C) According to the study, 33 percent of Sifakas are ambidextrous, showing equal facility using either their left hand or their right hand
D) Ninety percent of humans are right-handed, but those who are left-handed are likely to have at least one left-handed parent
E) Sifakas raised in captivity with right-handed adult Sifakas to whom they are not related are more likely to be right-handed than left-handed
OA E
Which one of the following, if true, most supports the researchers' hypothesis?
A) A study conducted on adult Sifakas revealed that many were right-handed
B) Right-handed Sifakas virtually all have at least one sibling who is left-handed
C) According to the study, 33 percent of Sifakas are ambidextrous, showing equal facility using either their left hand or their right hand
D) Ninety percent of humans are right-handed, but those who are left-handed are likely to have at least one left-handed parent
E) Sifakas raised in captivity with right-handed adult Sifakas to whom they are not related are more likely to be right-handed than left-handed
OA E
