Studies Using Sameroff's Environmental Risk Scale Have Demonstrated That

Studies using Sameroff's environmental risk scale have demonstrated that:

A) the fewer risks in a child's environment, the lower the child's IQ tends to be.
B) mothers' high school completion status has no impact on children's IQ.
C) environmental risks have long-term effects on children's intellectual development.
D) there is more stability in children's IQ scores than in their environments.