Which research sources are examples of secondary sources? Select two options. a copy of the Treaty of Versailles

a documentary about the American Civil War

an encyclopedia entry about the Spanish-American War

a government chart showing official census data from 1920

a televised interview with a survivor of the sinking of the Titanic

A documentary about the American Civil War/An encyclopedia entry about the Spanish-American War.

Explanation:

A secondary source is a source constructed from excerpts from primary sources, which are the most accurate sources related to a historic event.

Primary Sources

A copy of the Treaty of Versailles - The Treaty of Versailles is the primary sources of the formal conclusion of World War I.

A government chart showing official census data from 1920 - It offers information of the US population in 1920.

A televised interview with a survivor of the sinking of the Titanic - The survivor witnessed the sinking of the Titanic.

it provided for equal trade rights among nations in china.

they lost control of territory in the middle east, but preserved turkey's political independence.