The correct answer is "Educating the public is the primary goal of nonprofit media companies."
Nonprofit media companies differ from for-profit media companies in that they are primarily focused on providing a public service, such as educating the public, rather than generating profits for their owners or shareholders. While some nonprofit media companies may still rely on advertising as a source of revenue, this is not their primary goal or focus. Nonprofit media companies may also have a more diverse staff and may make decisions about ad sales based on their mission and values, rather than simply audience size or profitability.