They are used to transfer water efficiently through the towns and cities of Rome.
Socialism is a socio-economic system in which property and the distribution of wealth are controlled by the community for the purpose of achieving social and economic equality.
The correct answer is c - socialism.
This is the only possible correct answer. All of the other ones don't come into question. Communism is similar, but has slight differences in that sense which prohibit it from being correct.
B.basins being drained by river systems
