Which factors led to the decline and defeat of the Inca Empire?

Choose all answers that are correct.

AThe Spanish found many allies among the people the Incas had conquered.

BThe Inca leader Atahualpa was executed by the Spanish.

CThe Inca did not have the modern weapons and firepower that the Spanish did.

DThe Inca's extensive efforts to protect their leadership succeeded.

EDisease brought by the Spanish devastated the Inca population.