Alice Is a Possible Juror in a Trial of Carla

Alice is a possible juror in a trial of Carla for the crime of robbery. Alice is questioned as to her knowledge of the defendant and about her general notions of the guilt or innocence of persons accused of crimes. Which of the following motions by Carla's attorney is the best example of one that is both legally correct and tactically appropriate?

A) After Alice states she believes that police never make mistakes, Carla's attorney makes a peremptory challenge to excuse Alice from the jury.
B) After Alice states she believes that police never make mistakes, Carla's attorney makes a challenge for cause to excuse Alice from the jury.
C) After Alice states she is very excited to be selected to serve on a jury, Carla's attorney makes a challenge for cause to excuse Alice from the jury.
D) After Alice states she believes a person is innocent until proven guilty, Carla's attorney makes a peremptory challenge to excuse Alice from the jury.