
Passage: With the increase of age, people's daily demand for calories is decreasing, while the demand for vitamin B6 is gradually increasing. Unless older people take vitamin B6 as a supplement, or eat foods that contain more vitamin B6 than they ate when they were young, they are unlikely to get the vitamin B6 they need.
Question: The answer to which of the following questions is most helpful to evaluate the appeal argument?
A. A.Did most people eat far more vitamin B6 than they needed every day when they were young?
B. B.Is vitamin B6 in a fortified diet more easily absorbed by the body than vitamin B6 in the diet?
C. C.Does the reduction in the amount of calories you need every day be greater than the amount of vitamin B6 you need to increase every day?
D. D.Are the consequences of not getting enough vitamin B6 a day more serious for the elderly than for the young?
Answer: