Question

What effect did the invention of interchangeable parts have on the American economy?

a This invention caused the price of goods to skyrocket due to increased production costs.
b
The prices of goods fell dramatically due to the fact that the machines producing the goods could be built and repaired more inexpensively.
c
America saw a boom in the export of mechanical parts to places like England, France, and New Spain.
d
This invention made it harder for people to violate patents

Answer 1

I would say:

B) The price of goods fell dramatically due to the fact that the machines producing the goods could be built and repaired more inexpensively