African infants have had a greater chance of survival if they have a living maternal grandmother who is without young children of her own. This fact has been used to support an evolutionary explanation of ________.
a. habituation.
b. conservation.
c. assimilation.
d. stranger anxiety.
e. menopause.

African infants have had a higher chance of survival if they have a living grandmother who is with no young child of her own, this fact supports the evolution of menopause.

The 2 major hypothesis related to the evolution of menopause explains either to help the mother of the infant, protecting from the risk related to age-specific mortality or to provide maternal grandmothers who enhance their inclusive fitness.

Thus, the correct answer is - option E.

African infants have had a greater chance of survival if they have a living maternal grandmother who is without young children of her own. This fact has been used to support an evolutionary explanation of ________. a. habituation. b. conservation. c. assimilation. d. stranger anxiety. e. menopause.

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African infants have had a greater chance of survival if they have a living maternal grandmother who is without young children of her own. This fact has been used to support an evolutionary explanation of ________.
a. habituation.
b. conservation.
c. assimilation.
d. stranger anxiety.
e. menopause.