According to U

According to U.S. Supreme Court Justice White's plurality opinion in Florida v. Royer, seizure by police occurs when:

A) police officers approach an individual on the street and asks her to answer some
Questions.
B) the officer identifies himself as a police officer and asks the citizen to answer some questions.
C) a reasonable person would not feel free to leave.
D) when an officer in plainclothes approaches a citizen and asks questions about a crime without identifying himself as an officer.