Answer:
Option: They were the greatest in the ancient world.
Explanation:
The Roman Empire techniques of building structures in the early period were greatest in the World. They built roads, bridges along with houses and aqueducts. The Romans built aqueducts to bring water to cities and towns and supplied water in private households, public baths, farms, gardens, etc. The roads were often brick and included channels along the sides to prevent water from ruining roads. Romans also built bridges to connect between the city and its territories across rivers.