How did Rome build its economy without the existence of an extensive trade industry? Your answer: 
 A) Roman leaders led extensive military expeditions to conquer foreign territories and increase access to trade routes. 
 B) All other city-states were forced to pay taxes to the Roman Catholic Church in Rome. 
 C) Roman leaders encouraged a revival of the arts, and paintings and writings were sold to build up the economy. 
 D) Because the Roman Catholic Church was the center of the city-state, church officials raised money for the city.