Paul washes his clothes using cold water at the lowest possible level for the load. he is:
a: saving money n time
b: conserving water
c: protecting the environment against harmful toxins
d: causing unnecessary air pollution.

B: conserving water

Explanation:

By using water at the lowest possible level for the load, Paul is conserving water, which is just the amount necessary for his clothes.  With this measure he might save money (as he will be paying less for the water) but not time. This decision won't make difference concernirg the environment protection nor in causing unncessary air polution.

that is the way of a cheater and cheaters get nothing but bad grades and in trouble.

you didn't list the options but im guessing it's resolving contradictions