Police obtain a search warrant for Mary's house to search for cocaine. While executing the search warrant, the police look in a closet and find a sawed-off shotgun. The gun will be:

A. admissible if it was immediately apparent as contraband.

B. admissible only if the police found cocaine too.

C. admissible, but only if Mary gave consent to the search of the closet.

D. inadmissible, as the gun was not listed on the search warrant.

I think it's A, but not 100% sure.