Which piece of evidence best supports Schlosser's claim from the Introduction to Fast Food Nation?

A. Fifteen hundred people work inside the mountain, maintaining the facility and collecting information from a worldwide network of radars, spy satellites B. In 1975, about 1/3 of American mothers with young children worked outside the home; today almost 2/3 of such mothers are employed. C. During a relatively brief period of time, the fast food industry has helped to transform not only the American diet, but also our landscape, economy, workforce, and popular culture. D. Fast food is now served at restaurants and drive-throughs, at stadiums, airports, zoos, high schools, elementary schools