Many years ago, it was common to find small toys in boxes of breakfast cereal. One of these toys was a little submarine that had a compartment on the bottom for some baking soda (NaHCO3). On the top was another compartment connected to the first one with a small tube. This one was to be filled with vinegar (CH3COOH). After filling both containers and tightly covering them, the submarine was allowed to sink (usually in the bathtub with dirty children) to the bottom of the water where the vinegar then mixed with the baking soda. Which of the following answers describes the chemistry of the reaction that occurred as the submarine slowly rose to the surface?