Which transportation form was the most important of the 1800s?

Waterways and a growing network of railroads linked the frontier with the eastern cities. Produce moved on small boats along canals and rivers from the farms to the ports. Large steamships carried goods and people from port to port. Railroads expanded to connect towns, providing faster transport for everyone.

a is correct

hope this let me know if it is right

the answer is a new goverment.