Which item is a primary source?
Responses
A)a document written by someone who heard about an event from someone else
a document written by someone who heard about an event from someone else
B)an essay reviewing a book that was written during an event
an essay reviewing a book that was written during an event
C)a document written by someone who personally saw an event
a document written by someone who personally saw an event
D)a history textbook written about an event that happened centuries ago