Which example BEST illustrates a primary research source?
A.
a documentary about the effects of the westward movement and homesteading on the prairie during the 1800s
B.
a novel that tells the story of one pioneer family's struggles crossing the prairie during the 1800s
C.
a historical analysis of life on the prairie during the 1800s
D.
the diary of a woman crossing the prairie in a covered wagon during the 1800s