User blog comment:NotSoHappyTotalDramaFan/The Wawanakwa Massacre (Ep. 1)/@comment-24784093-20200114225611

Door B = Camera room, it seems the killer use this room to spy on his/her victims. The killer wont be there right now but maybe there is a clue

Door A = its sounds like a room that Duncan would check was there is inside

Door C = Since the door is not jammed, Duncan is not there