Please answer this: David works as a nutritionist with the public health department. He categorized the certain sections of his county's population. First he categorized boys and girls between nine and thirteen years as cat A. Then he put girls between fourteen and eighteen years in cat B, and boys of the same age in cat C. Lastly, he categorized pregnant women as cat D. He needs to recommend healthy diet, especially iron intake, for each group. Which group would need less iron, cat C or cat D?
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Answer: cat C

Please answer this: John is a doctor in a local hospital. Today, he is seeing two patients, patient A and patient B. Patient A has thyroid cancer, but patient B does not have thyroid cancer. John is trying to see the difference between these two patients' reports. Would patient B's thyroid gland absorb larger or smaller amount of radioactive material than patient A?
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Answer: smaller

Please answer this: Two friends named Jill and Jane met after many years and had a chat over a cup of tea. Jane was 70 years-old, while Jill was 55. They shared many stories. Which friend had a smaller chance of losing mental function because of age?
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Answer:
Jill