Which of the following is an example of a lord
a. a farmer who was not allowed to leave the land on which he worked
b. a soldier who swore an oath to protect the people and the land of a superior
c. a ruler whose subjects swore to absolute loyalty and service
d. a person who collected taxes and provided peasants with homes

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.