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Select the correct answer. Anthony's research question is "What environmental policies have been adopted to protect southern blue whales near the coast of Antarctica?" He is having trouble finding sources that answer this exact question. How should he revise his research question? O A. He should narrow his research question to focus his topic. O B. He should make his research question more concise. O C. He should make his research question more complex. O D. He should broaden his research