Imagine that you’re interested in learning more about the sooner land rush of 1889, where thousands of settlers charged into oklahoma to claim land. your teacher has asked you to find a primary source that discusses this event. which of the following is the best example of a primary source? a. a textbook that summarizes key figures and their contributions b. a movie that retells the story of the land rush c. a journal entry written by a settler who participated in the event d. a monograph that discusses perspectives of the event