In 1521, thousands of people in the aztec capital of tenochtitlán were killed by smallpox during an epidemic that swept through the city. this outbreak was one example of
a. the major impact that the arrival of europeans had on native american civilizations.
b. the lack of native american medical technology before the arrival of the europeans.
c. the problems with sanitation in native american settlements before the arrival of the europeans.
d. the new disease that europeans faced when they first encountered native american civilizations.

I think A because when columbus brought the Europeans,the Indians were shaking hands,getting coughed or sneezed on,and this lead to the indian population dropping from 20 million to 2 million and eventually they were all gone

Explanation:

the answer is c     : )

explanation:

i don't have an explanation because i don't know, but i think the answer is c because i googled it and google is right : ) just kidding google isn't allways right but the answer is still c. i hope this !

tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.