1: As my greatest nightmares all involve things happening to my family, and as there can be no suffering to anyone but me, I would choose A. I would have to keep telling myself that they are living better lives for it, that now they are happy, but atleast I would have the satisfaction of knowing I did the right thing. Although, I would make me feel terible to know they thought I was the cause of the suffering in the world.
2: I wouldn't care, I know there are whacked-out people in the world as it is, and why should one person take on all that for others?