How do historians analyze artifacts

One of the observations by someone who was present for roosevelt's speech was, "its clarity, logic, and sincerity struck us." quote one example from the text that you would describe as clear, logical, or sincere. explain the language in your chosen quote correctly, and tell why it can be considered clear, logical, or sincere.

Why have some historians rejected the labels bc and ad as laels for periods in world history

Which piece of information would most a historian create an interpretation of this photograph of works in a factory?