Which Statement About the Carolina Abecedarian Project Is TRUE

Which statement about the Carolina Abecedarian Project is TRUE?

A) The project was small in scale and aimed at providing a positive preschool experience for 3- and 4-year-old children.
B) The project concentrated on children who were only slightly at risk for developmental problems, such as those in moderate levels of poverty.
C) The project focused only on the participating child rather than on the entire family.
D) The project demonstrated that it is possible to design interventions that have lasting effects on the intellectual development of poor children.