by demetri.blaisdell Fri Sep 16, 2011 1:02 pm
Good question. The discrepancy is right in the open: if residents of Springfield live further away from their work, why are there twice as many bus lines in Rorchester?
This question is an EXCEPT question, so 4 will explain the discrepancy and 1 will either confuse us further or have no impact. (E) actually makes us more confused. If the people live further away and there are more of them, why won't the city build the people some bus lines?! This actually eliminates one of the easiest ways of resolving the discrepancy: Springfield has less people. Now that we know they have more people, the paradox is even more paradoxical.
(A) helps to explain the discrepancy. If Springfield residents are all going to a factory outside of the city, why would the city invest in buses?
(B) also gets us there. If Springfield residents all own cars, then again there's no reason to invest in buses.
(C) might appear out of scope at first, but take another look. The only discrepancy was in number of buses. If Springfield has more railway lines than Rorchester, that helps explain why they don't have as many buses. Everybody just takes the train.
(D) requires a careful reading of the stimulus. There are more bus routes in Rorchester, but not necessarily more buses. (D) tells us that despite having less routes, they are longer and have more buses running them (so they can deliver more passengers to meet that high demand).
I hope this helps clear up your confusion. Let me know if you have any more questions.
Demetri