We knew President Roosevelt would pass through
Michigan during his campaign, but we never expected him
to stop at little old Goldwater. He even shook my hand right
there on the train platform and gave a speech about how
his New Deal will help folks find jobs.
-Martha Jackson, diary (1936)
Why is corroboration the best way to confirm the credibility of this source?
O
A. Because it is far removed from the subject matter
B. Because it is a secondary source
O
C. Because it is a primary source
D. Because the author shows bias