Answer:
A) Building new bike paths in the city.
Explanation:
A)true-- this would likely encourage the use of bike riding as a form of transportation and a sources of safety to do so. This will likely decrease gasoline usage.
B) false-- there is a principle (in which the name I cannot remember) in which implies that the more room you have, the more you are likely to add in. So, at this rate, widening roads will increase the number of cars on the road, increasing gasoline usage.
C) false-- similar to above, you will be providing more places in which would require transportation to get to. So, at that rate, it is more likely that you will increase gasoline usage, as the city spreads wider.
D) false-- when considering economics, people will be more likely to use something they already own if that of which they can borrow increases in a way that is not beneficial to them. So increasing the bus fare rates will likely drive off commuters and increase the gasoline usages.
Hope this helps!