Differentiate primary and secondary sources with examples.

• A. Primary sources interpret the period, while secondary sources are direct from the period
• B. Primary sources are created during the period and provide direct evidence
• C. Primary sources are always less reliable than secondary sources
• D. Primary sources are direct from the period (e.g., a WWI diary); secondary sources interpret the period (e.g., a scholarly article about WWI)

Answer: (D)