The correct answer is C) The land and the frontier represent salvation.
The theme of 100% - The Story of a Patriot is "The land and the frontier represent salvation."
The talent of Upton Sinclair can be enjoyed in the book "100% - The Story of a Patriot," written in 1920 with his socialist approach to life. The novel refers to the story of a poor man called Peter Gudge that decide to be part of espionage in the industry and some corruption practices. Sinclair was a prolific author that wrote many books. Among the most famous were "King Coal," the Coal War, "The Fivver King," and "President Agent."