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 make his research question more complex.
O B. He should narrow his research question to focus his topic.
O C. He should make his research question more concise.
© D. He should broaden his research question.