The most suitable title for the passage is "B. At Sea on a Stormy Night." The passage vividly describes a tumultuous scene at sea during a stormy night. It mentions the rolling waves, mountains, caves, the constant change in the environment, the howling wind, and the clamorous voices in the sea when a ship is spotted. This conveys the setting of a stormy night at sea, making option B the most fitting title that captures the essence of the passage.