According to the author, what sets Ushuaia’s airport apart from others?
A. It is the only airport that flies trips into Antarctica.
B. It is close to Antarctica.
C. It brings many tourists into the country.
D. It helps supply the cruise industry.
E. It is the southernmost international airport.
In lines 8 and 9 the author states that "it is the southernmost international airport in the world." Option 2 is a possibility but it says it is close to Antarctica and not the closest. There are other airports close to Antarctica. thus option 5 is the best answer.