In Minnesota V.Dickerson,why Was the Defendant Not Convicted

Multiple Choice

In Minnesota v.Dickerson,why was the defendant not convicted?

A) Officer felt a substance in suspect's pocket, subsequently determined to be cocaine, during a pat down and manipulated it to determine what it was.
B) Defendant pled guilty before trial.
C) Judge declared a mistrial.
D) The charges were dropped by the prosecutor before trial.