What best describes the sources a historian uses to support an argument?

Historians rely on a variety of sources to support their arguments, including primary sources like letters, official documents, and artifacts, which provide firsthand accounts of events. Secondary sources, such as books and articles written by other historians, offer analyses and interpretations of those primary sources. Additionally, oral histories and cultural artifacts can enrich understanding by providing context and diverse perspectives. By critically evaluating these sources, historians construct well-supported narratives that reflect the complexity of past events.