Which event's led to the decline of the inca empire.

a.
pizarro sailed down the west coast of south america to peru.

b.
disease and civil war ravaged the inca empire.

c.
the spanish sent messages of peace and friendship to the inca.

d.
the inca learned from the aztecs’ mistakes and killed every spaniard they encountered.

e.
pizarro took atahualpa hostage and then had him executed.

B. DISEASE AND CIVIL WAR RAVAGED THE INCA EMPIRE. This led to the decline of the Inca Empire.

The civil war weakened the military of the Inca Empire. Thus, when Pizarro arrived to conquer them, they did not have enough number or strength to fight back. Pizarro also took their Inca Leader captive and killed him after receiving the ransom he demanded. With a dead leader and depleted resources, the Inca Empire gradually declined when Pizarro killed every Inca which took him 40 years to completely annihilate the race.