Which of the following would be a primary source for an article on the Battle of Gettysburg?
Correct Answer: A
Rationale: A letter written by a local farmer who witnessed the Battle of Gettysburg would be a primary source as it provides direct firsthand accounts and observations from someone who was present during the event. This source would offer valuable insights and perspectives for an article on the Battle of Gettysburg. Choice B, a documentary produced by a local TV station, is a secondary source as it interprets and presents information about the battle rather than providing direct firsthand accounts. Choice C, a novelization of the battle written by the great-grandson of a Union soldier, is also a secondary source as it involves interpretation and creative storytelling rather than direct eyewitness information. Choice D, a history textbook for a college-level course in American history, is a tertiary source that compiles information from various primary and secondary sources rather than presenting original firsthand accounts.