In a Long-Term Study of Applied Behavioral Analysis, One Group

In a long-term study of applied behavioral analysis, one group of children received 40 hours of therapy, a second group received 10 hours of therapy, and a control group received no therapy.Which of the following best describes the findings?

A) Both the 40-hour and 10-hour groups showed significant increases in IQ compared to the control group.
B) The 10-hour group exhibited no differences from the control group.
C) There was no difference between the three groups.
D) Both the 40-hour and 10-hour groups showed increases in IQ, but the members of the 40-hour group were more likely to be ready for a normal kindergarten class.