Two college buddies have known each other for 20 years. Tim was HIV positive while John was not and he didn't have a problem with it. Which friend has a greater chance of developing AIDS?
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Answer: Tim

Two groups of students went to the forest to explore nature and learn botany. Group D had some people experiencing mild allergy symptoms, and group C had a few folks with severe allergy symptoms, so they had to call the ambulance asap. Which group had more people with itchy eyes?
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Answer: Group D

John was driving through the Mohave desert. He first added antifreeze to the water in his radiator. He noted that in his journal as case A. Unfortunately, after some time he ran out of antifreeze, and couldn't add antifreeze any more. He noted that as case B. In case A would the water have higher or lower boiling point than case B?
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Answer:
higher