Nhận biết (M1)

Many visitors to Yellowstone National Park need airlines, car rentals, hotels, and restaurants during their visits. These services generate carbon emissions. Emily Wilkins and Jordan Smith found that most of the environmentally harmful emissions come from travel services to and from the park. Wilkins and Smith found that policymakers could help reduce these emissions by encouraging people to visit state or national parks closer to their homes to cut down on their travel.

Which choice best states the function of the underlined sentence in the text as a whole?

• A.

  It presents a harm that is unique to the location described earlier in the text.

• B.

  It indicates that policymakers have been working on a certain problem for a long time.

• C.

  It suggests a course of action to address the problem described earlier in the text.

• D.

  It rephrases the question raised in the first sentence of the text.