The Trial Judge Should Excuse a Potential Juror for Cause

The trial judge should excuse a potential juror for cause under which of the below circumstances?

A) The member stated that she would not cast her vote as juror in way that would lead to death penalty.
B) The member stated that he did not believe in the death penalty but would follow the judge's instructions on punishment.
C) The member stated that she was a retired cop.
D) The member stated that he worked in the state prison.