What Do Cohen and His Colleagues Suggest About the Need

What do Cohen and his colleagues suggest about the need for drastic interventions in preference to small interventions in the classroom setting?

A) Students of racial or ethnic minority backgrounds need immediate and drastic self-affirmation interventions to "close the gap" between their performance and that of their white classmates.
B) Only students whose families support self-affirmation exercises at home will benefit form classroom interventions.
C) When interventions are introduced in small but consistent doses, the long-term impact can be very significant.
D) The classroom intervention of self-affirmation is effective only when it is introduced by minority teachers, as students tend to disregard such efforts by white teachers.