Which of the Following Best Describes the Effects of Intervention

Multiple Choice

Which of the following best describes the effects of intervention programs such as Head Start?

A) They provide clear evidence that cognitive and language abilities can be enhanced.
B) Results have been mixed and no clear effect has been found.
C) They are not worthwhile on a long-term basis, but can be useful on a short-term basis.
D) They have been found to be most effective with adolescents rather than young children.