Answer:
Its B(and c if it you could answer 2 )
Explanation:
a. Sure your using plastic less but still you could have avoided the use of cups in all.
b. (we already know this is the answer but let me explain) If you use a car of course it would pollute the air so if you use a bike you would both be exercising and polluting the air less.
c. It would cocerve energy so the main reason i asked if it was multi answer.
d.what would that do, your still using water?
e. same answer as last explination.