Question

after the civil war, the united states experienced a burst of economic activity brought about by a wave of

gold mining

reform

amendments

industrialization

Explanation:

After the Civil - War, industrialization led to a surge in US economic activity with new technologies, factory growth, and expansion of markets. Gold mining alone did not cause such a broad - based economic burst. Reforms and Amendments were more about social and political changes rather than directly driving economic activity on this scale. Industrialization was the major force behind the economic boom.

Answer:

D. industrialization