The purpose of aqueducts was
to defend Rome against invaders
to bring water to the cities of Rome
to create a series of roads for travel outside the empire
to use for transportation in trade through water passages

Aqueducts required a great deal of planning. They were made from a series of pipes, tunnels, canals, and bridges. Gravity and the natural slope of the land allowed aqueducts to channel water from a freshwater source, such as a lake or spring, to a city.

answer: your option is d

explanation: