Use geographic terms and tools to explain why ancient civilizations developed networks of highways, waterways, and other transportation linkages.

Why did the Incans build such a large road network in their empire? (4 points)

A: They wanted to be the technological leaders of the world.
B: They were following orders from their gods.
C: They needed a way to connect their large, spread-out empire.
D: They relied heavily on trade with other civilizations.