Final answer:
The Spanish defeated the Inca despite being outnumbered by using superior weapons and tactics, as well as finding allies among tribes previously controlled by the Inca.
Step-by-step explanation:
The correct answer is A. Weapons, tactics. Despite being outnumbered, Spanish weapons and tactics allowed them to defeat the Inca.
One reason for the Spanish success was their superior military tactics and weaponry. The Spanish soldiers were protected by steel armor, wielded steel swords, and had the advantage of attacking on horseback. In contrast, the Inca warriors fought with bows and arrows, spears, and carried shields.
The Spanish also found unexpected allies among the tribes that were previously forced to pay tribute to the Inca Empire. These tribes greeted the Spanish as liberators and provided additional support in the conflict.