Answer:
A journal written by Christopher Columbus on one of his voyages
Step-by-step explanation:
A primary source document is a document that was written by a person who experienced an event first hand, while a secondary source document on the other hand, is a document that was written by someone who did not experience the event first hand.
The correct answer is option C because Columbus experienced the discovery of the New World first-hand.
The answer is not D because a document sent to New World miners by a Spanish official is a secondary source document.