Question

Even though unlit city streets were dangerous,

a. most city planners did nothing about it.
b. professional police officers refused to patrol them.
c. factory workers had to travel to and from work in the dark.
d. city governments rejected electric streetlights.

Answer 1

A. most city planners did nothing about it

Answer 2

Generally speaking, even though unlit city streets were dangerous "a. most city planners did nothing about it," since it was initially very expensive to put in new fixtures.