Research Has Studied the Relationship Between Breastfeeding During Infancy and IQs

Multiple Choice

Research has studied the relationship between breastfeeding during infancy and IQs later in childhood.According to these studies,

A) the effect of breastfeeding on later childhood IQ can be explained by birth weight differences.
B) there is no relationship between breastfeeding and IQ in later childhood.
C) breastfeeding for the first three months was associated with an increase in IQ,but there was no relationship after three months.
D) breastfeeding for more than six months was associated with a five- to seven-point increase in IQ.