Use reasoning to lead to the answer of the following question:
What systems are pollutants bad for?\nOptions:\n- (A) destroying life\n- (B) classification system\n- (C) an organism's body\n- (D) respiratory and circulatory\n- (E) animal habitats\n- (F) ambulatory systems\n- (G) social security system\n- (H) the environment

(D)
Air pollution harms the respiratory and circulatory systems.

Air pollution is caused by lots of different pollutants.

Several different pollutants harm the respiratory and circulatory systems.

.

The answer is (D)