<human>: Objective: Use strawberries and baking soda to whiten teeth

Which of the following solutions is more sound in terms of naive physics reasoning?

OPTIONS:
- A paste made from mushed up strawberries and instant yeast helps to clear away surface stains and remove plaque. Simply brush the paste onto your teeth with a toothbrush for several minutes, then rinse away.
- A paste made from mushed up strawberries and baking soda helps to clear away surface stains and remove plaque. Simply brush the paste onto your teeth with a toothbrush for several minutes, then rinse away.
<bot>: A paste made from mushed up strawberries and baking soda helps to clear away surface stains and remove plaque. Simply brush the paste onto your teeth with a toothbrush for several minutes, then rinse away.