Which statements an event that contributed to the decline of the Aztec empire.

Which statements describe an event that contributed to decline of the Aztec Empire. (A). Smallpox weakened the Aztecs' ability to resist. (B). The Spanish took Montezuma prisoner. (C). Cortes gave up his desire for more gold. (D). The location of Aztec capital made trade difficult. (E). Aztecs welcomed the Spanish with gifts.