The correct answer is B) form a small circular group to create a warmer pocket of water in the center of the circle. This is the correct answer because it is the best way for survivors in the water to conserve body heat and increase their chances of survival. Forming a tight circular group helps reduce heat loss by creating a warmer pocket of water in the center of the group. This is a key survival technique recommended by the US Coast Guard for survivors in the water. The other options are less effective. Sending a swimmer to shore is risky and may result in additional casualties. Lashing life preservers together can create an unstable raft. Tying themselves together can prevent them from reaching rescuers or making it to shore if needed.