The correct answers are A) weapons and D) diseases.
What contributed to the fall of Middle American Indians to the Spanish were their weapons and diseases.
The Spanish conquerors, led by Hernán Cortés, were believed to be gods by the Native American Indians of the region. That is why the Indians welcomed and received them in their palaces. The Spaniards had impressive weapons and animals never before seen in the Americas. These animals scared the Indians. We are referring to the horses. And about weapons, spades and the use of power massacred many Indians.
Regarding diseases, Indians were very clean and hygiene people. The Spaniards were totally the opposite and they brought with them diseases such as chickenpox, malaria, small pox, and influence, that killed millions of Indians.
