Which research sources are examples of secondary sources? Select two options.a copy of the Treaty of Versaillesa documentary about the American Civil Waran encyclopedia entry about the Spanish-American Wara government chart showing official census data from 1920a televised interview with a survivor of the sinking of the Titanic

Secondary sources interpret, summarize, or analyze information from the past rather than presenting direct evidence from the event. A documentary about the Civil War and an encyclopedia entry about the Spanish-American War both present information compiled after those events. A copy of the Treaty, the original census data, and an interview with a Titanic survivor are primary sources because they provide direct evidence from the time or from someone who experienced it.

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