Which Is True About Containers

Which is true about containers?

A) They can only be searched with probable cause and a warrant.
B) No warrant is ever needed to search them,if there is probable cause to do so.
C) No warrant is needed if the container is found in a car the police have probable cause to search,and the container is a likely place where the items searched for may be found.
D) No warrant is needed if the container is found in a vehicle the police have probable cause to search,regardless of the nature of the container.