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Bunuel
A certain city has had many vacant homes in the downtown neighborhoods. The city loses significant tax revenue each year because those houses stand unoccupied. The city felt that the fear of crime was keeping professionals from moving into these houses. Over 80% of the city's professional work force live outside of the city, in nearby suburbs, and commute daily.

Plan: Five years ago, the city tripled the size of the municipal police force, increasing patrols throughout the city. All studies have confirmed that crime has dropped substantially.

Result: the vacancy rate in these single-family houses has not changed substantially in five years.

Further information: Almost all of the vacant houses are in excellent condition, ready for occupancy. The city supports a number of high-paying professional jobs, and the state economy has been booming over the past five years.

In light of the further information, which of the following, if true, does most to explain the result that followed the implementation of the plan?

(A) The commuting costs in this metropolitan region, in dollar per mile, are among the highest in the entire country.

(B) Over 60% of the expanded municipal police force lives somewhere within the city limits.

(C) Recent studies confirm that the crime-rate in the city is no higher than the average crime-rate in the surrounding suburbs.

(D) Homes in this city, close to downtown, cost on average 40% more than a home of comparable size in the surrounding suburbs.

(E) In a recent survey, almost three-quarters of the professionals who live in the suburbs and work in the city say that they would prefer to live in the city.
­

Official Explanation



Perfectly good houses downtown are vacant, and the city wants to change that. The city thinks the reason for the vacancy is crime, and they take steps that reduce crime, but the houses remain vacant. This is a paradox. We are asked to explain the paradox, that is, why the steps they took, which legitimately reduced crime, did not result in folks moving into those houses. In other words, we need to find another reason why those houses are and remain vacant.

(D) is the credited answer. Homes downtown are more expensive, so folks living in a house in the suburbs would not be able to afford one. That would explain why the homes are still vacant.

(A) & (E) are both facts that would explain why people would want to move into the city; rather than explain the result, these amplify the paradox.

(B) is irrelevant: the fact that the police live someone in the city does not explain at all why the downtown houses in particular are vacant. This is a distractor answer.

(C) suggests that crime is not the reason that the house are vacant --- the results of the plan also suggest that, but it doesn't suggest another reason why the houses are vacant.
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