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 federal government was too weak no enforce their laws and couldnt levy taxes, and only could request taxes in the aricles, which was a main reason of its failure. There was no national courts set up in the articles or national currency. Im not sure exactly what the question is asking but im assuming its talking about how powers differed between the constitution and the articles and in conclusion I would say, after independance America was a baby country who was scared of the rights being incriminated once again so the central government had very little powers.