It is observed in chimpanzees that in both male and female of the species mating and start a family early live longer than those that do never mate. This does not show that mating early causes the chimps to live longer, since, as compared to other chimps of the same age, young chimps that mate early are the ones that are the dominant male and female of the chimpanzee’s social hierarchy and the posses better physical and genetic attributes than do the ones that do not mate.
Which of the following, if true, most strengthens the argument above?
A.Among chimps that mate early, those that avoid hunting and other perilous activities are less likely to engage in such activities after they find a mate
B.A chimp that has mated and started a family, but doesn't have superior physical qualities is more likely to involve itself in activities that will ensure greater physical development.
C.Chimps that have superior physical qualities but do not mate live longer than those that mate but do not have superior qualities.
D.A low-rank chimp, which lacks superior physical or genetic qualities, is more likely to mate with another chimp that is also low-rank.
E.Mating tends to cause chimps to engage less in risky behavior such as territorial fights and hunting.
Source:Crackverbal