Basically I believe it is all of the above, but I am sort of stumped on C and would like some explanation.

Which of the following is true about the siting of polluting activities in the U.S.?

a. Polluting activities are disproportionately sited in low-income communities.

b. Polluting activities are disproportionately sited in non-white communities.

c. Racial disparities in exposure to polluting activities are larger than income disparities in exposure to polluting activities.

d. Both a and b are correct.

e.All of the above are correct.