Sentence Correction

At Shiprock,New Mexico,a perennially powerful girls' high school basketball team has become a path to college fro 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 houshold incomes are
D)which has 49 percent of the household incomes
E)in which 49 percent of them have household incomes

Please help me to understand usage of 'where/which'

The answer is C. In this case, 'where' can be used because you are talking about particulars within that community. If you were differentiatingbetween a bunch of different possible communities then 'which' would be correct.

Also the correct construction is '49 percent are'. There is no need to put '49 percent of them' because 49 percent is a specific subject in itself and is clear. Adding that extra pronoun makes the sentence less concise.

Option A.
This option is too wordy thus this is not the correct answer.

Option B.
invalid expression.This option does not fully explain the writer's mind

Option C.
This is the correct answer as it fully explains a source of pride but that has a low income.

Option D.
'which' well this makes the statement invalid. 'Where' is far better.

Option E.
wrong sentence construction and suffers same fate a d D above.Thus, incorrect option.