What were some key inventions as well as transportation and economic improvements of the early 1800s ?

America's economic transformation in the early 1800s was linked to dramatic changes in transportation networks. Construction of roads, canals, and railroads led to the expansion of markets, facilitated the movement of peoples, and altered the physical landscape.

Explanation:

honestly i really it keep confusion down on some sides

i don't think it's c or d. i think it's either a or b.

hope this .