Dana and Sean both checked in as hepatitis B suspects, but only Sean had Hepatitis B. Dana was healthy and didn't carry the virus. Which patient experienced more vomiting?
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Answer: Sean

Two Islands were discovered by settlers, A small group of people moved to South island, but most of them moved to North island. People on North island had frequent food shortages. Which island had people with a lower birth rate?
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Answer: North

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 greater chance of losing mental function because of age?
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Answer:
Jane