What are the four major economic shifts (in chronological order) the united states has experienced?

The modern American economy traces its roots to the quest of European settlers for economic gain in the 16th, 17th, and 18th centuries. The New World then progressed from a marginally successful colonial economy to a small, independent farming economy and, eventually, to a highly complex industrial economy.

During this evolution, the United States developed ever more complex institutions to match its growth. And while government involvement in the economy has been a consistent theme, the extent of that involvement generally has increased.

Ithink the answer is b : )