The one that is an example of a source that gives firsthand information about an event is option A. Article.
Oral histories, newspaper or journal articles, and memoirs or autobiographies are examples of primary sources created after the event or time in question but offering first-hand accounts.
Primary data is a type of data that is collected by researchers directly from main sources through interviews, surveys, experiments, etc. Primary Sources are immediate, first-hand accounts of a topic, from people who had a direct connection with it.
Some examples of primary source formats include:
Therefore, the correct answer is as given above
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The complete question goes thus:
Which is an example of a source that gives firsthand information about an event?
A. Article
B. Letter
C. Website