A student is studying the life and work of the poet Phillis Wheatley, who lived during the American Revolution. Which of the following is an example of a secondary source that might be consulted for the study?

A diary is considered a primary source because it contains firsthand accounts and personal reflections from an individual who directly experienced events related to Wheatley. While it can provide valuable insights, it does not analyze or interpret her life in the way a secondary source would.

The Declaration of Independence is a primary historical document that represents the political context of the period during which Wheatley lived. While it is significant in understanding the era, it does not focus on Wheatley herself and thus cannot serve as a secondary source for her life and work.

Wheatley's poem is a primary source as it is a direct work created by Wheatley. It reflects her thoughts and artistic expression but does not provide an external analysis or context regarding her life, making it unsuitable as a secondary source.