I believe it would be b. Eastern Orthodox.
All of the activities designed to get a candidate elected to public office are called campaigns. Campaigning is a very important part of getting the requisite amount of vote for getting to the public office. It is already been proved historically that proper campaigning can make a person get through the elections very easily.
Answer:
The Romens constructed aqueducts throughout the republic and later empire to bring water from outside sources into cities and towns.