When a Defendant Is on Trial for Murder and They

When a defendant is on trial for murder and they plead insanity as a defence, this means

A) the vulnerability-stress model would indicate they were not responsible for their actions at the time of the murder
B) the diagnosis fits the DSM-5 criterion
C) they were impaired enough at the time of the murder to not understand or control their actions
D) they are currently traumatized by their actions and are not capable of standing trial