I think tap dancing is an aerobic exercise.
Answer:
Both A and B, because if you have bad posture you will have weaker bones which can make you get hurt easier plus weaker bones will not be safe especially if you got in a car wreck.
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Protein digestion would be more difficult because of that buffering action of sodium bicarbonate on the stomach acid, which alters the optimum pH for the action of pepsin, a major protein-digester
