I believe that it is part of the rising action that reveals criminal activity.
If it's a custom to build a cemetery and a prison immediately, it means there is a reason for that - there is a lot of crime which ends up with someone being dead. We don't see the importance of prisons only, but rather of cemeteries as well, which is why A is incorrect; B is incorrect because Puritans weren't really that happy; D is incorrect because we don't see their work ethic here.
First blank: their
Second blank: there. Hope this helps. Please rate, leave a thanks, and mark a brainliest answer (Not necessarily mine)