[Q]: Ben and Jack both loved microorganisms. Jack decided to study more about lactic fermentation, while Ben decided to study more about protozoa. Which person read more about lactic acid causing tooth decay?
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[A]: Jack

[Q]: David is an entomologist. He recently got interested in ants and their behaviors. To that end, he studied a group of ants, which be labeled as case A. To compare ants with other ant like creatures he studied another hymenopteran group, which he labeled as case B. Moreover, he noticed two distinct trails made by the ants, trail A or trail B. Trail A was followed by many ants, but trail B was abandoned by them. Would trail A be shorter or longer than trail B?
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[A]: shorter

[Q]: Two students had to study fermentation processes for a school project. Ned studied lactic fermentation, while Kat studied alcoholic fermentation. Which student read less about bacteria carrying out lactic acid fermentation?
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[A]: Kat

[Q]: Mike is a physician who treats HIV-infected patients. Today, he is seeing two patients, patient A and patient B. Patient A is infected with HIV, but patient B is not infected with HIV. Mike is trying to figure out how HIV-infected patient is different from the patient who is not infected with HIV. Which patient would have weaker immune system, patient A or patient B?
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[A]:
patient A