Which of the following is not true of static characters?

a. they are often stock characters
b. they often play supporting roles
c. they do not change during the course of the story
d. they cannot be the hero of the story

Cameron, who has an extreme and unreasonable suspicion of other people and their motives, suffers from paranoia which is a psychological disorder characterized by delusions of persecution or grandeur, was absolutely sure that someone was following him even though he was absolutely alone and hadn't seen a car for miles and miles.