Free LSAT Practice Question

Question 1 of 1
ID: LSAT-LR-034
Section: Logical Reasoning
Topic: Strengthen
Difficulty level: Easy

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Ecologist: The otters came back to the river because the paper mill closed. Otters need a river with fish, and for thirty years the mill's outflow had left the lower river almost without them. Fish counts began rising the year after the closure and have risen every year since; otters were first seen two years after that, and there are now three known holts on the lower river.

Which one of the following, if true, most strengthens the argument?

AThe mill closed for commercial reasons unconnected with the state of the river or with any pressure from the authorities.

BOtters lived on the river before the paper mill was built, and held holts on the lower river in those years.

CFish counts on a tributary the mill never discharged into rose over the same years, by much the same proportion as those on the lower river.

DNo other change to the water quality of the lower river — from farmland, from the town, or from other works — occurred between the mill's closure and the rise in fish counts.

EOtters will travel as far as twenty kilometres overland to reach a river that has fish in it, and otters were present on rivers within that distance throughout.

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