Based on information in the article, which of these events must have happened first?
A. Beekeepers began reporting that their bees dying off due to Colony Collapse Disorder.
B. European honeybees were introduced to the United States.
C. Scientists published the results of a study about honeybees and pesticides.
D. Bees died off in large numbers during an unusually bad winter.
Based on information in the article, which of these events must have happened first?
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The correct answer is B. European honeybees were introduced to the United States.
Explanation: This event must have happened first because before beekeepers could report issues like Colony Collapse Disorder or scientists could study the effects of pesticides, there needed to be a population of European honeybees established in the United States. Without their introduction, the subsequent events involving the bees wouldn’t have been possible. If you have more questions or need further assistance, feel free to ask!