The main cause of the collapse of the Aztec and Inca empires was . A.
a long drought
B.
the arrival of European invaders
C.
defeat by local enemy tribes
D.
civil war within the empire

B. The arrival of European invaders

Explanation:

The Spanish Conquistadors invaded both empires, defeating both of them in combat and introducing deadly European diseases to the continent.

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.