Results of a Study That Randomly Assigned Mother Infant Dyads

Multiple Choice

Results of a study that randomly assigned mother infant dyads either to an intervention encouraging breast-feeding or to a control condition without intervention indicated all EXCEPT

A) it is difficult to encourage mothers to breast-feed.
B) any relation between breast-feeding and cognitive development can be accounted for by social class.
C) only infants with a specific allele that regulates fatty acids show benefits from being breast-fed.
D) there is no well-established nutritional superiority of breast milk.