Correct answer choice is:
They built a vast network of roads, bridges, and tunnels.
They imposed their language and religion on conquered peoples.
Explanation:
The goal of this is to build a course that the Incas can practice to develop a bond with other communities, both for financial or strategic objectives. By making this, they are preparing to expand their culture and leadership to their triumphs and make incorporated them into a part of their community. (which would strengthen their armed assets).