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Select the correct answer. Jack has set out to research the question "YVhy are blue whales important?" He is having trouble going through the dozens of different books he found on this subject at the library. Hows should he revise his research question? A. He should narrow his research question to focus his topic. B. He should broaden his research question. C. He should make his research question more complex. DBD. He should make his research question more concise