Free LSAT Practice Question

Question 1 of 1
ID: LSAT-LR-106
Section: Logical Reasoning
Topic: Inference
Difficulty level: Medium

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On the Vearn branch a signal clears of itself only after the track circuit reports the section ahead empty. Rust on a lightly used rail head can stop the circuit reporting a section empty when it is, and the signal then stays at red until a controller clears it by hand. Controllers cleared signals by hand forty times on the branch last month, against twelve on the neighbouring Ardo branch.

Which one of the following is most strongly supported by the statements above?

ARust accounts for most, if not quite all, of the twenty-eight hand clearances by which Vearn's total exceeded Ardo's.

BOn each of the forty occasions last month when a Vearn signal cleared, the track circuit had reported the section ahead empty, that being the condition on which a signal clears.

CForty interventions on the Vearn branch need not mean the circuit was at fault forty times, since rust is named as one thing that holds a signal at red, not the only one.

DArdo is the busier branch, so rust forms less readily on its rail heads and its signals seldom need a hand.

ESignals on the Vearn branch are held at red more often than anywhere else on the network, forty clearances being over three times the neighbour's.

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