[Q]: John was trying to reenact Le Chatelier's principle. To that end, he conducted four tests, test A, test B, test C, and test D. In test A, he didn't input any stress to a chemical system in equilibrium. But In test B, he put some stress to the same system. In test C, he observed a forward reaction, but in test D, he observed a reverse reaction. In which test Le Chatelier's principle had been applied, test A or test B?
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[A]: test B

[Q]: Two students learned about respiratory systems in animals. Dana learned more about mammalian lungs, while Barry learned more about the lungs of birds. Which student learned more about surface area for gas exchange between the lungs and bloodstream?
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[A]: Dana

[Q]: Two people went to the eye doctor's office for an annual exam; James had farsightedness, while Bob had perfect 20/20 vision. Which person saw more distant objects clearly?
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[A]: James

[Q]: Anthony is going in for a doctors appointment. He hasn't been feeling well and has been vomiting. When he talks to his doctor the doctor can tell immediately what's wrong. Anthony's physical appearance immediately tells the doctor that he likely has hepatitis B. Given a person's eyes and skin tone appear to be yellow and they experience vomiting, will the chances that they have hepatitis B increase or decrease?
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[A]:
increase