Question

the second industrial revolution in the united states resulted in the rapid growth ofa. government b. unionsc. taxesd. cities

Answer 1

I would say D.  The second industrial revolution was a growth in the industry, it grew factories, technologies, etc.  That in turn, grew cities.  The government basically stayed the same, unions weren't quite around yet, and taxes were the same. 

Answer 2

Answer:  D. Cities

Futher detail:

The Industrial Revolution had its beginning in Great Britain, and eventually spread from there.  Once the United States became involved, especially in the "Second Industrial Revolution" years (1870-1914), the size and resources of the country allowed the US to become a bigger industrial power than the nations of Europe.

Industrialization also led to the phenomenon of urbanization -- the movement of people away from the rural countryside and into cities.   That also led to other issues, like sanitation and crime problems in cities.  So sanitation and health measures were enacted, and the first police forces were formed.  For instance, in 1838, Boston established the first fully organized police force with full-time on-duty officers, paid as public servants.  By the 1880s, all major US cities had established regular police forces.