Which of the following are needed to support a claim about history?
a. conclusions
b. questions
c. sources
d. arguments

C. Sources

Explanation:

A historian cannot create an argument or reach in a conclusion without the sources. And what is a source? A source is a historic document used to maintain a theory or argument. Depending on the ideological proposition followed by the historian, these sources can change. Today, a historic source can be more than just an old document, and now a historian has many choices such as videos, photographies, music, and the talked history.

an era of negotiation.

is that an answer to your question?

explanation:

what are the statements? are there any examples?