Why was the national road an important part of overland transportation in 1818? a. it was the only profitable turnpike in the united states.
b. it was successfully funded by tolls.
c. it was the only good route from maryland to the ohio river.
d. it was the first turnpike built by chartered companies.

it was the onl good route frm maryland to  the ohio river

Explanation:

it provided for selection of government employees through competitive examinations. it also made it unlawful to fire or demote covered employees for political reasons or to require them to give political service or payment, and it set up a civil service commission to enforce the law.

explanation: