1. Sander was a student at Lawrence University, a public medical college. One weekend during the school semester, Sander was arrested by Lawrence City police for participating in a demonstration against the government's position on nuclear disarmament. When Sander was brought before a judge for arraignment, however, the court dismissed the charge with the consent of the public prosecutor. The following day, the dean of Lawrence University called Sander into her office. The dean referred to the arrest, and said that because his conduct had embarrassed the school, Sander was expelled. Sander subsequently sued Lawrence University for damages resulting from his dismissal. The most effective argument in support of Sander's claim is that the dismissal violated Sander's right
   1. to an administrative hearing.
   2. to due process.
   3. to freedom of expression.
   4. under an implied contract with Lawrence University.