Question

An author studies maps and diary entries made by Columbus and his crew on their journeys of exploration. He writes a book interpreting the meaning behind these records.

Answer 1

✔ A secondary source ** is the correct answer

Step-by-step explanation:

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Answer 2

This question is the same with with the question ID#985068. If this is definitely the same, my answer would be that the author is making a book on a secondary source. Why?

Secondary sources are sources based on established historical facts. It is clearly stated here that the author has made a book(source) based on maps and diary entries of Columbus and his crew on their journeys of exploration (a historical fact).