When Are the Police Allowed to Search People When Executing

When are the police allowed to search people when executing a search warrant

A) police can thoroughly search everyone on the premises whenever they execute a search warrant
B) police can do a pat-down for weapons on every person present when they execute a search warrant
C) police can do a thorough search of people on the premises only if the warrant specifically authorizes the search of those individuals
D) police cannot search people when executing a search warrant unless they are arresting them