Before a Patient Died,the Physician Asked the Father for Permission

Before a patient died,the physician asked the father for permission to use his son's organs,explaining that he is already "brain dead" and the respirator is keeping the other organs alive.The father's response,which is consistent with his Orthodox Jewish faith,would most likely be which of the following?

A) "Yes, God would want him to help others."
B) "No, his heart is still beating."
C) "Yes, his soul is already with God."
D) "Yes, but the procedure must be done before sundown."