In a Natural Experiment Conducted in India That Compared Children

In a natural experiment conducted in India that compared children of the same age who had different number of years of schooling, the researchers concluded that

A) schooling made a smaller impact on the children's competence than did the children's everyday experiences.
B) competence increased in direct relationship to the number of years of school the child had attended.
C) there was no difference for children in elementary school, but schooling became more important for older children.
D) the structure of the children's families had a bigger impact than did the number of years they had attended school.