Answer:
D. Limiting processed food
Explanation:
The best vitamin to recommend in the scenario given above is VITAMIN B3, WHICH IS ALSO KNOWN AS RIBOFLAVIN. John is suffering from ariboflavinosis, which is a deficiency disease that is due to inadequate intake of riboflavin and the disease is characterized by sores on the mouth.
Well, think about it. Who wears a white coat? Scientists and doctors usually wear white coats and in the question, it says that they are advertising a health product! It matches together! Nina should conclude that the health product is most likely helpful and has a use, especially when a doctor or scientist is recommending it!
I hope this helps:)
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