The Aztecs were conquered by Spain in 1521. Which of these statements is true regarding the defeat of the Aztecs? A. The Aztec's enemies helped to defend the Aztecs from the Spanish. B. The siege of Tenochtitlan wasn't very long and the battle was over quickly. C. The Aztecs were greatly outnumbered by the Spanish army. D. Smallpox and hunger killed more people than actual battles.