Answer:
d. They were extraordinarily unhappy places.
Explanation:
Jonathan Kozol was noted author who as the teacher witnessed the inequalities in school and subsequently wrote about them in his books. He traveled extensively and compared the condition of schools in different parts of the United States. His depiction of poorly funded schools, overcrowded classes, lack of infrastructure, variation in the allocation of funds at different places made him question the ideals of equal rights in American society. His book 'Death at an early age' and 'Savage inequalities' raised some serious questions on the education system.
