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According to the passage, research suggests that one possible reason the Africanized bees in Brazil have successfully resisted Varroa jacobsoni is that
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A.the life cycle of the Africanized bee may limit the Varroa jacobsoni mite's opportunity to reach full development
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B.the Africanized bees may have had an opportunity to develop a chemical resistance to Varroa jacobsoni
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C.the location of bee colonies in Brazil may provide a natural deterrent to Varroa jacobsoni
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D.Varroa jacobsoni may be relatively new to Brazil and may not have had time to become widespread
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E.beekeepers may have developed effective control techniques for Varroa jacobsoni
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