Which of the following is true of defense attorneys?

Which of the following is true of defense attorneys?
 
  A) They have considerable discretionary authority in choosing whether to seek a conviction for those arrested and how vigorously to prosecute a defendant.
 B) They are either elected or appointed to office and are therefore political figures who must periodically seek reelection or reappointment.
 C) They are supposed to represent their clients' interest before the criminal justice system.
 D) They usually focus police departments' attention on which violations will be further processed by the criminal justice system.