I. Compliance holds on a subject who is physically fighting with his wife during a domestic disturbance
II. Use of firearm against a suspect, who is armed with a knife, has just stabbed a store clerk, won't put the knife down, and is telling the officer he is going to kill the officer
III. Use of chemical gas against a protester who refuses to leave the courtroom
IV. Use of a taser on a 12-year-old middle school student who spits at the police officer
A) I, II
B) I, II, III
C) II, III, IV
D) III, IV