What is one technological advancement created by the Romans that is still used today? O catapults
O concrete
O aqueducts
O accounting

aqueducts

Explanation:

An aqueduct is a structure constructed by the Romans which s still in use by modern engineers. It was constructed to transport water from different cities and towns to the places where the availability of water is minimal. The water is distributed to distant places through aqueducts. The Roman aqueduct had proved itself to be a reliable and efficient structure to be used in modern times too. The first aqueduct was built by Romans in 312 BC. The advancement in this discovery helped the Roman cities to rise in terms of water facility, sanitation, and health.

B) CONCRETE

Explanation:

edg

do u have any answer choices?

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.