Free LSAT Practice Question

Question 1 of 1
ID: LSAT-LR-092
Section: Logical Reasoning
Topic: Strengthen
Difficulty level: Hard

Practice Mode: Single selected Question » Back to Overview

Image analyst: In our March imagery a field shows as bare ground only if it was ploughed before the image was taken. Twenty of the hundred fields show as bare; the estate's records list forty as ploughed by that date. A colleague reads the shortfall as a failure of the imagery. But the rule does not run in the other direction, and the shortfall is what it predicts.

Which one of the following, if true, most strengthens the image analyst's reply?

AThree of the twenty fields that show as bare ground in the March image are listed in the estate's own records as never ploughed that season.

BA field ploughed some weeks before an image is taken need not still be bare: on many soils a flush of weeds closes over the ploughed surface within a fortnight.

CThe estate keeps its ploughing records by field name while the survey numbers its fields, and the two lists had to be matched by hand, entry by entry, before any comparison.

DThe twenty fields that show as bare ground in the March image are, so far as the two lists can be matched, all of them among the forty that the estate's records give as ploughed by that date.

EA field ploughed in spring need not be ploughed again before the autumn imagery is flown, though most are.

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