Question: Use strawberries and baking soda to whiten teeth

  Options: 
 A. 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.
 B. 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.
Answer: B