Please answer the following question: Fact 1: Air pollution harms the respiratory and circulatory systems. Fact 2: Air pollution is caused by lots of different pollutants. Given the two facts above, answer the question "What systems are pollutants bad for?" with the following options: - destroying life - classification system - an organism's body - respiratory and circulatory - animal habitats - ambulatory systems - social security system - the environment
A:
respiratory and circulatory