Interestingly enough, the answer for (blank) in North Korea appears to be D. All of the above.
As someone over @FR said, this is one way to alleviate prison overcrowding. Which reminds me, as far as I can tell, the reaction from global "human rights" groups to this practice is as loud and clear as usual:
-cheep cheep-
I can think of one positive thing to say about NK: They positively suck.