The muckrakers were the ones to focus on poverty and corruption in the cities
The Battle of Oriskany is a turning point in the war because it played an important part to the defeat of the British campaign in the North.
Diseases introduced by white settlers.
The main reason for the wipe-out of Native Americans was the threat of the diseases introduced by White Europeans. This ended up killing many Native Americans across different tribes, as they had no immunity to these diseases and had never dealt with these kinds of illnesses before. This was a rampant problem and attained the Native Americans quickly after the European settlers arrived.
Out of the choices given here. the Constitution reflects the principle "republicanism" because it divides the legislative branch into two houses of elected officials.