What constitutes a secondary source?

A secondary source is characterized by its creation after an event has taken place, providing interpretation or analysis of the original events or primary sources. These sources can include articles, books, documentaries, or critiques that reflect on the period, summarize findings, or present opinions about the events that occurred.

Since secondary sources are formed based on reflection or examination of primary sources, they do not consist of original documents created during the event itself, first-hand accounts, or reports produced at the time. Instead, they offer context, analysis, or commentary based on the information derived from primary sources, making option C the correct definition of a secondary source.