[Q]: Greg is studying the environmental impact of agriculture. He noticed that in his own state a lake near agricultural lands has been declared as a dead zone. For his study Greg labeled this zone as zone A. Then he found near a national park in his state a lake is not declared as a dead zone. To further his study he labeled this zone as zone B. Which zone is not a result of algae overgrowth, zone A or zone B?
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[A]: zone B

[Q]: John and Keith are two friends. They went to see an ophthalmologist for an eye cheek up. The doctor found that John had myopia, but Keith had normal eyes. He advised them according to his findings. Who would see distant objects more clearly, John or Keith?
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[A]: Keith

[Q]: Tim and Jeb were both studying chemical engineering. At a certain point in time, Jeb started studying chemicals that are not harmful for the environment, while Tim started learning about chemicals that were once used, but now are known to be harmful for the environment. Which student studied less about lead?
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[A]: Jeb

[Q]: Hank and Dean studied plate tectonics in college. Hank learned more about divergent boundaries, while Dean read more about convergent boundaries. Which student read more about the forming of new oceanic crust?
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[A]:
Hank