Please help me with this question

Jill has decided that she wants to start conserving gasoline. jill is concerned about the rising price of gas, as well as how the by-products from gas engines pollute the atmosphere. what solution would jill solve this problem? a) deciding to drive her car less until the price of gas goes down. b) deciding to ride her bicycle to and from work, instead of driving. c) deciding to use premium unleaded instead of regular unleaded gasoline. d) deciding to move to a city where smog from automobiles is not a problem.