[Q]: Mike grew tomatoes on his parcel of land and so did John. Mike's attempt was very successful, because he adjusted the soil's pH to a viable level for growing vegetables, and John didn't. Both parcels had soils with lots of sodium carbonate in them. John's experiment failed. Which parcel had a more alkaline soil?
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[A]: John's

[Q]: John studies how chemicals affect environment. He traveled to the Amish country to see their traditional ways of farming. He noticed they don't use any fertilizers or pesticides. He labeled this part of the study as case A. Then he visited a modern farming facility where they use tons of fertilizers and pesticides. He labeled this part of the study as case B. In which place people might get sick drinking groundwater, case A or case B?
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[A]: case B

[Q]: Two people went to the eye doctor's office for an annual exam; James had farsightedness, while Bob had myopia. Which person didn't have lenses focus images farther forward in the eye?
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[A]: Bob

[Q]: Robert and Justin are both patients in the hospital who are suffering complications from their HIV infections. The doctor is trying to get information from both men about their diseases so he can create customized treatment plans for both men. After a few questions, the doctor discovers that Robert has been infected with HIV for many years, while Justin's infection is quite recent. Who will develop infections less frequently?
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[A]:
Justin