The fall of the Aztec Empire, the encomienda system, and the missionary work of the Roman Catholic Church are all associated with
(1)ethnic tensions in the Balkans
(2)oil politics in the Middle East
(3)colonialism in Latin America
(4)migration in sub-Saharan Africa
Aztec Empire called themselves the Mexica- they were in today's Mexico
the encomienda was a Spanish colonial system, so it must have been in a spanish colony
The Roman Catholic Church did a lot of missionary work in Latin America (but also some in Asia and Africa) - and most of Latin America is catholic today