Piedmont(United States)
Or the Appalachian Mountains
The correct answer is d. Medical technology was used to treat malaria. Malaria was rampant in the tropical regions and the Europeans conquering these regions had challenges combating the disease. The colonists and locals had a form of treatment before identifying the cause of the disease. The isolated and used quinine to treat the illness.
In 1870 the 15th amendment was ratified and gave the right to vote to all males including african ammericans