Which of the following best describes Thomas Paine's Common Sense?

Thomas Paine's "Common Sense" is best described as a primary document because it is a firsthand account that reflects Paine's arguments and views during a specific historical moment—the American Revolution. As a primary document, it provides direct insight into the political thoughts and motivations of the time, serving as a foundational text that helped sway public opinion towards independence from British rule.

This work is considered essential in understanding the context of the revolutionary ideas circulating in the 18th century, showcasing Paine's rhetoric and persuasive techniques aimed at encouraging colonists to support independence. Its direct engagement with contemporary issues at the time underscores its importance as a primary source, enabling readers to grasp the mindset and arguments prevalent during the revolutionary period.