The correct answer is B) are seated with seat belts on and doors shut. A self-righting survival craft is designed to automatically return to an upright position if it capsizes, provided the occupants are properly secured inside. With the doors shut and seat belts fastened, the weight of the passengers is distributed evenly, allowing the craft to self-right. The other options are incorrect because having passengers escape the craft (A) or shift to one side (D) would disrupt the weight distribution and prevent the self-righting mechanism from working as intended. Keeping the doors open (C) could also compromise the craft's stability and self-righting capabilities.