The Early Intervention Model in the 1980s That Used Parents

The early intervention model in the 1980s that used parents as trainers was called into question because

A) professionals were unable to work effectively with parents as partners in the training of young children.
B) research indicated children were learning more in center-based programs.
C) families were dropping out of early intervention programs, preferring to be parents not trainers.
D) there was a lack of funding available for home-based programs.