Bunuel wrote:
It can safely be concluded that there are at least as many trees in Seclee as there are in Martown.
From which one of the following does the conclusion logically follow?
(A) More trees were planted in Seclee in the past two years than in Martown.
(B) Seclee is the region within which Martown is located.
(C) Martown is suffering from an epidemic of tree-virus infection.
(D) The average annual rainfall for Seclee is greater than the average annual rainfall for Martown.
(E) The average number of trees cut down annually in Martown is higher than in Seclee.
OFFICIAL EXPLANATION
(A) No. Initially, there may have been many more trees in Martown than in Seclee. So it may take many years of planting trees in Seclee before their number is greater than in Martown.
(B) Yes. If Martown were entirely within the boundary of Seclee, then there would be at least as many trees in Seclee (probably more) as there are in Martown since every tree in Martown would also be in Seclee. The following diagram may help:
(C) No. We don’t know whether the virus caused the trees to die. Even if it did, we still don’t know whether this caused the number of trees in Martown to be less than or equal to the number of trees in Seclee unless the virus destroyed all the trees in Martown.
(D) No. We don’t know how rainfall affects the proliferation of trees.
(E) No. There may have been many more trees in Martown than in Seclee. So it may take many years of cutting down the trees before their number is fewer in Martown than in Seclee. Also, new trees may spring up more quickly in Martown than in Seclee.
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