Apolitician running for office writes a book about her major accomplishments and charitable donations. what problem might a historian have when trying to use this book as a source for a historical argument?
a. the book is likely to be biased in favor of the politician.
b. the book is a primary source and cannot be credible.
c. the book is about charity rather than important political themes.
d. the book is not old enough to be considered a reliable source.