Which of the following contributed to the fall of Middle American Indians to the Spanish? Select the two correct answers.

weapons

the Olmec

the Maya

diseases

slaves

The correct answers are:

- Weapons: The Spanish conquistadors had superior weapons, such as firearms and metal armor, which gave them a significant advantage in battles against the Middle American Indians.

- Diseases: The introduction of diseases, particularly smallpox, which the Middle American Indians had no immunity to, caused devastating epidemics that decimated their populations and weakened their resistance to Spanish colonization.

Neither the Olmec nor the Maya directly contributed to the fall of Middle American Indians to the Spanish. The Olmec civilization predates the arrival of the Spanish, and the Maya civilization had already experienced significant decline before the Spanish conquest of the region. Slaves were also not a direct contributing factor to the fall of Middle American Indians to the Spanish. So, the incorrect answers are the Olmec, the Maya, and slaves.