Which of the following items could serve as a primary source for a historian studying the american civil war? a. a journal written by a civil war soldier describing a major battle b. a map of important civil war battles printed in a military history textbook c. a documentary film describing important civil war generals d. an essay about civil war soldiers written by a modern graduate student

The correct option is A.
There are two basic sources which an author can draw from when writing an article. The first one is primary source and this refers to an account of an event or history by a person who actually witness the event or the person who experience the event directly. The second one is secondary source and it refers to those accounts of events that are drawn from primary sources.
Thus, a journal account about civil war by a civil war soldier who experienced the war is considered a primary source.

They had strained relationships with colonists but good relationships with american indians