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What is the main difference between a primary source and a secondary source?

A.
A primary source is more useful than a secondary source.

B.
A primary source cannot be trusted, but a secondary source can.

C.
A primary source is written well after an event, whereas a secondary source is written immediately after the event.

D.
A primary source is written by someone who saw the event, but a secondary source is not.

Respuesta :

Tuniss
D. A primary source is written by someone who saw the event, but a secondary source is not.

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