Which of the following statements best describes the effect of the Civil War on the ideology of northern workers? Group of answer choices It convinced many workers that the northern economy required cotton and other products from the South. It reinforced their commitment to "free labor" as employers and employees both benefited from the wartime economy. It led them to challenge the "free labor" idea that opportunity led to success, because workers often struggled while employers grew wealthy. It convinced many workers that the northern economy would thrive regardless of whether or not the nation was reunited