In New York City, There Was a Debate Whether to (1)

In New York City, there was a debate whether to (1) retrofit the city's buses for wheelchair access, or (2) pay the taxicab fares of the disabled. Proponents for making the buses handicapped accessible were motivated by concerns of:

A) efficiency; it is much more expensive to pay taxicab fares than retrofit buses.
B) fair and equal treatment.
C) the deadweight losses from higher taxes associated with paying taxicab fares.
D) the higher carbon emissions of taxicabs, which is a form of externality.