The correct answer is 3) building roads for automobiles.
An example of city improvement during the late 1800s was building roads for automobiles.
In that time, the automobile industry was developing and cities did not have the number of roads or the quality of roads to be used by the automobile. So as the car industry grew, cities needed roads for this mean of transportation that became so popular although expensive for its time. So one sign of modernity in the late 1800s was the building of new roads for automobiles which showed how a city was improving in its services.
