Explain ONE economic change in America in the period 1450-1750

with my knoladg i would say it was c

from my own personal expirence food stamps has alot this makes it eaiser so we can affod bills and so we can life a better lifestyle not needing to worry about paying actual money to buy food since most people spend 100-300 dollars a month on food so this alot so we can afford other bills and other stuff we need

d) in the state of iowa