Free LSAT Practice Question

Question 1 of 1
ID: LSAT-LR-070
Section: Logical Reasoning
Topic: Strengthen
Difficulty level: Easy

Practice Mode: Single selected Question » Back to Overview

Since the mill leat was reopened, the trout have returned to the upper beck. The leat draws water off the beck above the weir and returns it below, and trout need moving water over gravel to spawn. The beck above the weir had been still for forty years and held no trout at all, though its water was clean throughout that time and the weir itself was never altered.

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

AGravel beds were exposed on the upper beck within a season of the leat reopening, where forty years of silt had covered them before.

BTrout were present in the beck below the weir throughout the forty years in which the upper beck held none, in numbers that varied little from year to year.

CTrout have also returned over the same years to two other becks in the valley, neither of which was affected by the reopening of the leat.

DThe mill the leat once served has not worked since 1961, and the estate found no use for the channel in the decades that followed.

EReopening the leat cost the estate very little, the work being done by two men over one winter.

» Quit