Why might it be difficult to be a historian

The major challenges to historical research revolve around the problems of sources, knowledge, explanation, objectivity, choice of subject, and the peculiar problems of contemporary history. Sources The problem of sources is a serious challenge to the historian in the task of reconstructing the past.

a.) a poor farmer, due to the fact that they would want to be freed from british rule.

answer; i believe the correct answer is (the willamete valley);