[Q]: John wanted to revisit Aristotle's theory of tetrapods. To that end, he chose two tetrapods, tetA and tetB. An adult tetA was heavier than an adult tetB. Moreover, a tetA had longer gestation period than tetB. He needed to figure out how their characteristics fit Aristotle's theory. Which tetrapod would live shorter, tetA or tetB?
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[A]: tetB

[Q]: Two medical students learned about the human body's defense against pathogens. Niles learned about the body's first line of defense, while Bill learned more about the inflammatory response. Which student learned less about signs of inflammation?
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[A]: Niles

[Q]: Scientists studied water stratification in two saltwater lakes. they were trying to find out why the fish population decreased in Long lake, and was very healthy and abundant in Shoal lake. They found out the phenomenon occurred more often in Long lake, leading to very many unpleasant chain effects. Which lake had more denser layers of water?
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[A]: Long lake

[Q]: City D's mayor wants to invite more businesses in the city. Three firms, firm A, firm B, and firm C, took advantage of this opportunity. Firm A does not require large initial costs, but firm B and firm C require large initial costs. Firm B managed to increase its market share, but firm C failed to increase its market share. Which frim's average total cost would decline, firm B or firm C?
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[A]:
firm B