The ancient Rome economy did not make use of
A. barter B. trade C. coins D. Paper money

D. Paper money

Explanation:

We can eliminate option C because it was their main source of currency. Trade is used to import goods from other places, an important factor to the community. The barter system was a common way of paying or trade, so the same goes for option A.

Let me know if this is correct :)

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."

according to worldatlas.com, the u.s. has an 86% literacy rate.