Which of the following is a secondary source?

• A. A textbook chapter that analyzes events
• B. An original diary entry
• C. A photograph from the scene
• D. A government document with raw data

Answer: (C)

Secondary sources interpret or analyze information from primary sources, offering commentary, synthesis, or evaluation rather than presenting original evidence.

In these options, a textbook chapter that analyzes events fits that idea because it explains and puts events into context by referring to original materials. The other items are primary sources: a diary entry provides firsthand accounts from the period, a photograph captures a moment in time at the scene, and a government document with raw data records information as it was collected.

So, the textbook chapter that analyzes events is the secondary source.