Clayton is a 19-year-old college student. He avoids milk, because he claims drinking the beverage upsets his stomach and gives him intestinal "gas." However, he can eat yogurt and certain types of cheese without experiencing any symptoms. Based on this information, Clayton probably has

A. lactose intolerance.
B. botulism poisoning.
C. type 2 diabetes.
D. metabolic syndrome.


Answer: A

Nutritional Science

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