Final answer:
Betty Friedan's interviews with Smith College graduates revealed a widespread frustration among women with their limited roles as homemakers, which led to her influential work on The Feminine Mystique.
Step-by-step explanation:
When Betty Friedan interviewed Smith College graduates for her book The Feminine Mystique, she found that most of the women were frustrated with their limited domestic roles. This major finding dispelled the myth that all women were content to be homemakers alone and highlighted a widespread sentiment of unfulfillment.
These results of Friedan's research created a social revolution, helping to stimulate the second-wave feminist movement and encouraging women to seek new opportunities beyond the traditional homemaker role.