Nhận biết (M1)

In a study by Mika R. Moran, Daniel A. Rodriguez, and colleagues, residents of Mexico City, Mexico, and Panama City, Panama, were surveyed about parks in their cities. Of the 562 respondents from Mexico City, 77.6% indicated that they use the city's parks, and of the 318 respondents from Panama City, 53.5% indicated using city parks. Given that the percentage of Mexico City respondents who reported living within a 10-minute walk of a park was much lower than that reported by Panama City respondents, greater proximity alone can't explain the difference in park use.

Which choice best describes the function of the underlined portion in the text as a whole?

• A.

  It provides context to help readers understand the scope of the researchers' survey.

• B.

  It introduces a counterexample to the scenario described earlier in the text.

• C.

  It marks a shift from a discussion of the researchers' conclusion to a discussion of their methods.

• D.

  It identifies the nature of a relationship that is significant to the text's conclusion.