Gustavo wants to include primary sources to support his claim about the Industrial Revolution. Which sources should he use? Choose three correct answers.

Primary sources come directly from the time being studied or from people who experienced it. A factory worker’s journal and a labor organizer’s speech were created during the Industrial Revolution, and an original photograph of a factory from that era is direct visual evidence. Textbooks, expert magazine articles, and historians’ essays are later interpretations, so they are secondary sources.

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