C. Can a public body limit comment?

Yes.  A public body may limit public comment during an open call by imposing reasonable time, place and manner restrictions.  See id.  “Although it is legally appropriate to stop a speaker who is reasonably perceived as threatening, disorderly, or impeding the fair progress of discussion, public bodies must be cautious not to halt a speaker because of the speaker’s viewpoint.”  Ariz. Att’y Gen. Op. No. I99-006.