The type of nonviolent protest exhibited by the college students in this scenario is a Sit-in.
A sit-in is a form of protest where people occupy a space and refuse to move from it to draw attention to the issues that they are protesting about.
The college students in this instance, sat at the counter and did not move until closing time so that their demands for racial equality could be met.
In conclusion, option B is correct.
Find out more on sit-ins at https://brainly.com/question/26698331.