The method a historian would use when thinking about the unique beliefs and viewpoints of an author and how they could influence their source is: historical context.
Historical context can be defined as the circumstance or event that led an author to write a story.
Historical context is important as it help to reveal important details a reader may have missed out when reading an author text.
Therefore the method a historian would use when thinking about the unique beliefs and viewpoints of an author and how they could influence their source is: historical context.
Learn more about Historical context here:https://brainly.com/question/17237466
#SPJ1