A submarine started at sea level and was 400 meters below sea level in 10 minutes. Which statement correctly explains the submarine’s rate of movement? A. Since = 40, you find that the submarine ascended at a rate of 40 meters per minute. B. Since = –40, you find that the submarine ascended at a rate of 40 meters per minute. C. Since = 40, you find that the submarine descended at a rate of 40 meters per minute. D. Since = –40, you find that the submarine descended at a rate of 40 meters per minute.