What causes colds? A. Not dressing warmly when it's chilly.
B. Microscopic virus in the air or on the things you touch.
C. sitting or sleeping on a draft.
D. going outside with wet air.

What is the best way to use the clean water act to address the issue of dirty water and diseases that plague asmall community? a) to report the number of cases of people who havecholera symptomsb) to provide health guidelines about effects from waterborne diseases c) to enforce standards that focus on chemical dischargeinto bodies of waterd) to carry out research that investigates how dirty wateraffects human health