47. What do hard greens think about having people live in large cities and having them move to country homes4

(A) More people should move to the country in order to reduce pollution.
(B) More people should move to the suburbs to plant fields of organic vegetables.
(C) People should live in the cities so as to save cost on transportation and save energy.
(D) People should live in the cities so forests and wild life in the country may be saved.