Question

question 7 (1 point)
(lc)
which industry did not exist in the united states until the second industrial revolution?
a steel
b railroad
c shipping
d mining

Explanation:

Steel - making technology advanced greatly during the Second Industrial Revolution. Railroads, shipping, and mining existed before. Railroads boomed earlier, shipping was long - established for trade, and mining of various minerals was ongoing.

Answer:

A. steel