A student is writing a research paper on the history of space exploration. Which of the following would be considered a primary source for this topic?
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A
A peer-reviewed article analyzing the cultural impact of the moon landing.
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B
A textbook chapter summarizing the key milestones of the space race.
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C
The official transcript of the radio communications between Apollo 11 and mission control.
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D
A biography of astronaut Neil Armstrong written by a famous historian.