Why was the national road an immportant part of overland transportation in1818

What is the biggest difference in citiz en participation in government between ancient athens and the modern united states?

How was rockefeller able to build his monopoly across the oil industry? he found newer and cheaper ways to refine oil, increasing his profits. he confined his business to ohio so he could buy all the refineries there. he bought up oil refineries, cut costs, and reinvested his profits in other refineries. he began to sell kerosene as well as oil, expanding his market.

During the 1800s, an important pull factor for immigrants to the united states was