Why did the aztecs settle in the valley of mexico?

(a.) they wanted to take over abandoned mayan cities.
(b.) the area was located near a major river system.
(c.) the valley had a warmer climate than the mayan lowlands.
(d.) surrounding volcanoes created fertile soil in the valley.

In harriet's country, the ten provincial states that make up the nation hold the majority of power, with a small central government handling foreign policy and trade. harriet lives under a government best described as which of the selections listed below? select one: a. parliamentary b. federal c. confederal d. unitary