Which statements describe factors that led to the decline and defeat of the aztec empire?

a. the aztecs has never seen steel weapons or horses before.

b. despite negotiations, the spanish and the aztecs went to war, though neither side wanted to.

c. peoples who had been conquered by the aztecs joined the spanish to defeat them.

d. the aztecs has no strong leaders and limited military skills.

e. the aztecs were friendly when the spanish first arrived and bought them gifts.