What Is the Supreme Court's Justification for Saying That the Fourth

What is the Supreme Court's justification for saying that the Fourth Amendment does not require police to obtain a warrant to search automobiles when they have probable cause to believe that a vehicle contains contraband or evidence of criminal activity?

A) Because a warrant is never required for any movable object such as a vehicle.
B) By the time the officers could obtain the warrant, the suspects could have driven away and destroyed any evidence
C) Because there is no right to privacy in a vehicle that may be operated on a public roads.
D) Because warrants are only required for personal property such as homes, apartments, or garages.