What Is Varelius's Reason for Thinking That the Comprehensibility of a Person's

What is Varelius's reason for thinking that the comprehensibility of a person's committing suicide should be assessed from the viewpoint of the person herself?

A) Whether or not one commits suicide is always one's own decision.
B) Variation in temperament, personal history, and worldview can make people experience similar circumstances differently.
C) Others can be better informed about what is good for a suicide candidate.
D) None of the above.