How did the construction of roads most contribute to the economy of the Roman Empire? Farmers could travel down roads to get necessary water.
Roads created improved trade routes over long distances.
Roads reduced the use of enslaved workers for free labor.
The government collected high taxes from those traveling the roads

Roads created improved trade routes over long distances.

Explanation:

Roman empire get facilitated through the construction of roads as it promotes heavy transportation and trade in between and outside the empire. They used to put a stamp on their territory so that they can easily calculate the number of vehicles per day crossing the inter linked roads and make them benefited through increased trade and commerce.

a.

congress passed laws allowing for free passage between states.

i believe your answer is d)