In the Study of Very-Low-Birth-Weight Infants Born into Homes of Low

In the study of very-low-birth-weight infants born into homes of low socioeconomic status, which of the following aspects of the mothers' behaviors did not predict their children's level of intellectual development at 12 months of age?

A) Mothers who tried to maintain their children's interest in some ongoing activity had children with higher cognitive and language scores than did less-engaging mothers.
B) Mothers who attempted to stop what their children were doing or saying had children with lower cognitive scores.
C) Mothers who attempted to stop what their children were doing or saying had children with lower language scores.
D) Mothers who were restrictive has children with higher cognitive and language scores.