Where did you see a conclusion nested among the questions?
The questions presuppose and imply the need for answers before making any decisions.

I agree NK technology is not fully developed but it is advancing.   Even if a limited number of ICBMs, for instance, are 'successful', the damage will be catastrophic.   I do not see an ideal course of action here but there are also massive risks with allowing the situation to worsen (NK increasing technological competence and inventory of nuclear weapons).