Cross-Cultural Studies Show That in Many Non-Western Cultures Mother-Infant "Co-Sleeping

Cross-cultural studies show that in many non-Western cultures mother-infant "co-sleeping" is the rule.Which of the following is not a benefit of mother-infant co-sleeping?

A) Infants nurse more often.
B) Infants receive more stimuli.
C) Infants are less susceptible to sudden infant death syndrome.
D) Mother gets at least as much sleep as mothers who do not sleep with infants.
E) Infant begins to adapt to separation of space and individual identity.