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?

I believe the answer is: steep increase of business profits due to government contracts

The contracts that created by the government provide the private sectors with several projects that they can take on that might increase their profit. Example of such contract would be things such as contract to help the government building a bridge or contract to help the Government in developing a certain technology.