Question

in the united states, the second industrial revolution lasted from
the end of the american revolution to 1800.
the end of the american revolution to 1850.
the end of the civil war to 1900.
the end of the civil war to 1950.

Explanation:

The Second Industrial Revolution in the US occurred after the Civil War (which ended in 1865) and was largely over by 1900. The American Revolution ended in 1783 and is too early. 1950 is too late as the Second Industrial Revolution's key period was the late - 19th century.

Answer:

the end of the Civil War to 1900.