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Which of the following best explains the observations concerning DDT resistance in mosquitoes?ACompetition for limited resources causes mosquitoes to migrate to geographical areas that have richer supplies of DDT.BThe proportion of DDT-resistant mosquitoes in a population remains constant due to the metabolic costs of DDT utilizationCNatural selection favors DDT-resistant mosquitoes that are already present in a population when DDT exposure occurs.DDDT is a chemical signal that delays normal reproductive cycles in many mosquito populations.
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