D and V Have a Heated Argument Regarding the Ownership

D and V have a heated argument regarding the ownership of tools. D stabs V with a knife and kills him. D suffers from clinical depression. D's mental condition will only be relevant to the 'objective' test in Loss of Control if:

A) It is related to the gravity of the qualifying trigger (or provocation) (ie: if it was the subject of the provocation.) .
B) It is reasonable to D to kill.
C) It can be argued that the mentally ill are entitled to be provoked.
D) It reduced D's powers of self-control.