Question

By the beginning of the twentieth century, the United States economy revolved around

A. agriculture.
B. education.
C. trucking.
D. factories.

Answer 1

D. Factories
Try that one it might be it

Answer 2

I think it is D.Factories

Step-by-step explanation

Around this time the economy in the US became very industrial because of the fall of agriculture since a lot of farmers moved north to work in factories