What document, signed by Britain and the U.S., condemned Nazi aggression and defined the roles of the Allies?

The Atlantic Charter is the correct response because it was a pivotal document signed in August 1941 by British Prime Minister Winston Churchill and U.S. President Franklin D. Roosevelt. This charter outlined the shared goals of the United States and Great Britain in terms of post-war peace and security, emphasizing principles such as self-determination for nations, the importance of economic cooperation, and the promotion of social welfare. It effectively condemned Nazi aggression and articulated the vision for a world free from tyranny, serving as a foundational text for the Allies as they organized their collective response to the Axis Powers during World War II.

The other choices do not fit this context: the Monroe Doctrine was a 19th-century policy that opposed European colonialism in the Americas; the Paris Peace Accord refers to agreements that ended the Vietnam War; and the Fit for War Charter is not a recognized historical document related to the Allies' strategy or responses during World War II.