What did the Second Industrial Revolution combine?

a.

Evolutionary and Revolutionary socialism

c.

Bourgeoisie and proletariat

b.

Subways and streetcars

d.

Industry and transportation

The Second Industrial Revolution combines industry and transportation. The correct option among all the options that are given in the question is the last option or option "d". The Second Industrial Revolution is also known as Technological Revolution. It started in the later half of the 19th century and culminated at the starting of World War I.