Which of the Following Is Not an Example of Confinement

Which of the following is not an example of confinement, an element of false imprisonment?

A) Locking the victim in a room with one door and no windows.
B) Placing armed guards outside the victim's apartment while the victim is asleep.
C) Posting a sign outside a store's shoplifter detention area reading, "WARNING! ATTACK DOGS AWAIT OUTSIDE THIS ROOM!"
D) Placing the victim in the back seat of an automobile, with all doors unlocked, driving at 75 mph on the interstate.