How did the rotating table policy at wellesley college change virginia durr's view on segregation?

This rotating table policy was explicitly acknowledge by Virginia Durr as a catalyst of her moral alteration from racist to civil rights activist. This policy let all students to eat meals with random students regardless of the culture and religion. But she refuses to do it because she was born at the South were racism has influence all the children and its people however, she ended up agreeing with it after threatening her to drop out from Wellesly College if she won’t embrace the policy. With this policy she was able to promote the moral development of an individual.

why what did she do?