The Abecedarian Program Was More Successful Than Other Preschool Compensatory

The Abecedarian Program was more successful than other preschool compensatory programs in fostering long-term success most likely because of all of the following except

A) it began at age 2 and continued through age 5.
B) children attended all year long, not just during the school year.
C) it had a low student-to-teacher ratio that allowed the staff to individualize instruction.
D) about half the participants received school-age intervention from kindergarten through grade 3.