Why would a historian use a primary source when studying about a historical event?

APrimary sources analyze the event's impact on long-term historical trends.
BPrimary sources contain lists of other books and articles related to the event.
CPrimary sources are created by people who actually experienced the event.
DPrimary sources give a broad summary of evidence about the event.

Verified Answer :

One of the main reasons why a historian would use a primary source when studying a historical event is because "C. Primary sources are created by people who actually experienced the event", and they can also be things that happened to be "around" at a certain time. 

Answer:

c primary sources are created by people who actually experienced the event  

Explanation: