Question

Suppose you have read two different books on World War II, and each book has different arguments about how the war started. Which of the following sources provides the best support for the authors' arguments?

Answer 1

which author used more reliable sources

Answer 2

Assuming that this is referring to the same list of options that was posted before with this question, the correct response would be the book that was written by a veteran of the war itself, since this would be considered a "primary source".