I think its c. or a. but pretty sure its c. sorry i couldnt help
Answer:
Letters and publications written by Nazi leaders before the Second World War.
Explanation:
This answer is correct because this historian is searching for the motives of these perpetrators, letters and publications can tell their thoughts and conversations.
Niccolo Machiavelli
Machiavelli was a diplomat in Florence who tried to answer how could a ruler guarantee that he would stay in power by writing The Prince in 1513. Machiavelli claimed that people were greedy and self-centered. He argued that rulers should not be good, and that rulers should do whatever is necessary to keep power and protect their city, including killing and lying. Today, when someone is called a Machiavellian, it means that they are acting tricky and not thinking about the good.
