Final answer:
Option B, 'The Aztecs were too disorganized to fight the Spanish', is NOT a reason why the Aztecs did not immediately repel the Spanish conquistadors; reasons like misinterpreting the Spaniards as gods and alliances with Aztec enemies were more accurate.
Step-by-step explanation:
The Aztecs did not immediately repel the Spanish conquistadors for several reasons, but the assertion B. The Aztecs were too disorganized to fight the Spanish is NOT one of those reasons. Instead, factors such as their initial belief that the Spaniards might be gods (A), underestimating the threat posed by the Spanish (C), and having many enemies willing to help the invaders (D) played significant roles in the Aztec Empire's inability to quickly drive out the conquistadors led by Hernán Cortés. For example, Montezuma II, the Aztec leader, thought Cortés and his men could be legendary "White Gods." The Spanish invaders also found allies in ethnic groups like the Totonacs and the Tlaxcalans, who had been subjugated by the Aztecs and welcomed the opportunity to rebel. Furthermore, the introduction of diseases like smallpox by the Spaniards severely weakened the Aztec population, contributing to the fall of Tenochtitlán.