Twenty Individuals Have Established a Picket Line on the Plaza

Twenty individuals have established a picket line on the plaza in front of city hall protesting a recent raise in water rates.The individuals are carrying signs reading "Water is a basic right" and "We're being hosed." They are also chanting "Down with the rate hike!" Persons coming to city hall must pass by the picket line in order to enter the building.The police are called to the scene.The police supervisor tells the protesters to go home.They ignore his order.Which of the following is an accurate statement regarding this situation?

A) The protesters are committing criminal trespass because the plaza in front of city hall is not an appropriate place to protest.
B) The protesters will be committing criminal trespass if they refuse to leave after the mayor gives them written notice on city letterhead.
C) The protesters are committing criminal trespass because the police supervisor gave them notice to depart and they have failed to do so.
D) The protesters are NOT committing criminal trespass because they are merely exercising their First Amendment right to peacefully protest on public property.