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 having a showup instead of conducting a lineup violate Fred's rights?

A) Yes, the Fifth Amendment gives the suspect the right to choose between a showup and a lineup.
B) Yes, the Supreme Court ruled that showups are unconstitutional.
C) No, officers are allowed to conduct showups in the field immediately after a crime as long as there is reasonable suspicion to detain the suspect.
D) No, the fact that Fred was running from the scene made it legal to conduct a showup even though a lineup would normally have been mandated.