Dan Called the Police and Told the 911 Operator That

Dan called the police and told the 911 operator that a man just stole his wallet and ran east on Main Street. Officer Ewing was immediately dispatched to the location. He saw a man in a warm-up suit running east on Main Street about three blocks from where Dan reported the theft occurred. Officer Ewing transported Fred, the man he saw running, to where Dan was waiting. Dan asked to have Fred turn sideways so he could see his profile. As soon as Fred turned, Dan said, "That's him!" Did Officer Ewing have the right to detain Fred for the purpose of having a showup?

A) Yes, there is an emergency exception to the Fourth Amendment that allows officers to stop individuals fleeing the scene of a crime.
B) Yes, a suspect has no Fourth Amendment right to refuse to participate in a showup.
C) No, Dan's description was too vague to establish reasonable suspicion to stop Fred.
D) No, a person may be detained for a showup only if there is probable cause to arrest him or her.