Question

While reading a chapter in a book about the history of the US economy, you read about how the economy added more corporate, professional jobs after World War II. Which development do you most expect the book to include as support for this detail?
increased integration of women in the labor force during the war
wages of workers remaining relatively stagnant during the war
steep increase of business profits due to government contracts
federal government preventing unions from striking during the war
federal government enacting rationing to preserve goods