An Officer Stops a Young Man on the Street Legally

An officer stops a young man on the street legally and subjects him to a frisk.The officer is extremely thorough in the frisk.He even asks the young man to empty his wallet.Is the extent of this frisk permissible?

A) Only if the officer reasonably believes the wallet might contain a weapon.
B) No, because the scope must be limited to the discovery of guns, knives, and other weapons.
C) Yes, an officer may search to whatever extent necessary when detaining a criminal suspect.
D) No, because the frisk can only occur after transportation to the police station.