Digital PSAT Reading and Writing Practice Question 268: Answer and Explanation
Question: 268
Spanning more than 1,500 miles, the border between Canada and the United States has been called the longest undefended international boundary in the world. This is true to some extent, in that neither the United States nor Canada maintains a military presence at the border. But as anyone who has crossed from one side of Niagara Falls to the other knows, civilian law enforcement is present and accounted for at checkpoints on both sides of the boundary, where entrants are monitored and customs laws administered. Partly because of our cultural similarities and partly because of the remarkable amiability of our diplomatic relations over the past 150 years, it can sometimes seem almost as though the distinction between Canada and the United States is more of policy than of practice.
Which choice best states the function of the underlined sentence in the text as a whole?
- A. To analyze the economic consequences of international borders on global commerce
- B. To explain the details of the security screenings that people who cross the U.S.-Canadian border must undergo
- C. To give evidence of the continual border hostility that the United States and Canada have had since the war of 1812
- D. To clarify that although the United States and Canada have friendly relations, they are still clearly two different countries
Correct Answer: D
Explanation:
D. The sentences prior to this indicate that there is not much of a border between the United States and Canada, given how undefended it is. These lines clarify that the two countries are, in fact, very much independent of one another. Choice A would require more information about other countries' borders to provide such an analysis. Choice B is incorrect because there is no detail provided about the security screening process. And choice C is incorrect because the essay does not support the idea that there has been continued border hostility between the two countries since the War of 1812.
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