Results of a Study That Randomly Assigned Mother‒infant Dyads Either

Multiple Choice

Results of a study that randomly assigned mother‒infant dyads either to an intervention encouraging breastfeeding or to a control condition without intervention indicated all of the following EXCEPT:

A) it is difficult to encourage mothers to breastfeed.
B) any relation between breastfeeding 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 breastfed.
D) there are no well-established nutritional superiority of breast milk.