Free LSAT Practice Question

Question 1 of 1
ID: LSAT-LR-018
Section: Logical Reasoning
Topic: Assumption
Difficulty level: Easy

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Naturalist: The corncrake has come back to the Aldney marshes because the reed cutting there was moved from June to September. Corncrakes nest in June and have left the marshes by August, and cutting in June destroys the nests. Since the change was made the marshes have held breeding corncrakes every year, where before it they had been empty of them for a decade.

Which one of the following is an assumption required by the argument?

ANo other change in the Aldney marshes over the same period accounts for the corncrakes' return to breeding there.

BCorncrakes are more numerous in the Aldney marshes than anywhere else in the county where reeds are cut, including sites where the cutting has always been done in June.

CReed cutting in September does no harm to corncrakes, so that moving the work to that month removed the damage rather than shifting it later in the year.

DCorncrakes will keep returning to the Aldney marshes to breed for as long as the reed cutting there stays in September rather than moving back to June.

EThe reed cutting could not have been moved to any month but September without harming the reed crop.

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