Answer:
The correct answer is C.
Step-by-step explanation:
The Aztec Empire was an alliance between three Aztec city-states: Tenochtitlan; Texcoco; and Tlacopan. This alliance was located in the Valley of Mexico and continued from 1428 until they were conquered by the Spanish conquistadors under the leadership of Hernan Cortes in 1521.
This alliance was formed by Itzcoatl of Tenochtitlan, Acolhuacans of Texcoco, and small-town states of Tlacopan in 1428. At the height of its glory, the Alliance controlled almost all of Central Mexico except for a small area southeast of Tenochtitlan: Tlaxcala. Tlaxcala allied with Cortes in 1521 to destroy this alliance.