OG165

165. At Shiprock, New Mexico, a perennially powerful girls' high school basketball team has become a path to college for some and a source of pride for a community where the household incomes of 49 percent of them are below the poverty level.
(A)where the household incomes of 49 percent of them are
(B)where they have 49 percent of the household incomes
(C)where 49 percent of the household incomes are
(D)which has 49 percent of the household incomes
(E)in which 49 percent of them have household incomes

B和C的意思怎么不同了?有没有人用中文解释一下,看了很久不明白.

B社区拥有49%的低于贫困线的收入

C社区中的收入49%低于贫困线的收入