Evidence Offered by the Defense as to the Accused's Mental

Evidence offered by the defense as to the accused's mental condition before or after the offense is:

A) not relevant and therefore is inadmissible.
B) admissible regardless of how far removed it is in time from the offense.
C) usually not admissible, because it is not relevant to the question of mental condition at the time of the offense.
D) usually admissible if not unreasonably far removed in time.