Which one of the followings describes the reasoning of the Court in Illinois v. Wardlow?

a. Under the Fourth Amendment one had no right to go about his business; the police thus had reasonable suspicion to stop the defendant.
b. Under the Fourth Amendment one had the right to go about his business; the police thus had no reasonable suspicion to stop the defendant.
c. Under the Fourth Amendment one had the right to go about his business; the defendant's conduct showed that he was going about his business and the police had no reasonable suspicion to stop him.
d/ Under the Fourth Amendment one had the right to go about his business; the defendant's conduct showed that he was not going about his business and the police had reasonable suspicion to stop him.