The answer is a bc the answer is a
Nobles and knights were obliged to protect those who lived on the manor and provide personal and military service to the king.
The Battle of Bunker Hill took place on June 17, 1775, just a few months after the start of the American Revolutionary War.
The answer is B, Jacob Riis.
Jacob Riis is most known for his pictures of an impoverished New York City, and worked for better living conditions in those areas.