Results of Early Intervention Studies with Children from Poverty-Level Families

Results of early intervention studies with children from poverty-level families whose mothers had low IQ scores support the conclusion that

A) at least 50 percent of IQ is inherited.
B) heredity has a significant effect on IQ.
C) environment has no real effect on IQ.
D) early intervention is only effective when children have well-educated mothers.
E) intervention must provide consistent frequent stimulation.