Question

to keep water from being polluted, individuals can
a use chemicals in the house and yard as little as possible and always follow directions
b repair engine leaks immediately
c be sure storm drains are kept clean
d all of these

Explanation:

Each option helps prevent water pollution: reducing chemical use limits runoff contamination, fixing engine leaks stops oil/grease from entering waterways, and keeping storm drains clean prevents debris and pollutants from being carried into water systems. All actions are valid individual measures to protect water quality.

Answer:

d. All of these