Which of the Following Is Not an Exception to the Warrant

Which of the following is not an exception to the warrant requirement for a lawful search?

A) A search when the owner or a person who appears to have authority voluntarily and intelligently consents to the search.
B) A search of a residence if there is probable cause to believe evidence of a crime will be found.
C) Anything discovered by police in plain view if the officers are legitimately on the premises.
D) A stop and frisk of a suspect if the officer reasonably believes the suspect is dangerous.