What led most directly to the fall of the aztec empire?

a
the rise of the inca

b
the establishment of tributes

c
the death of moctezuma ii

d
the fall of the triple alliance .

According to the lesson, what was the central issue in the struggle over which reconstruction plan to implement? how would freedmen be treated in the southern states? did congress or the president have the ultimate authority? was the radical republican or democrat plan better? would the courts be allowed to decide reconstruction issues?