- Passenger turned on laptop computer and plane veered off course/had dimming dials on navigation system
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Navigation systems are being put at risk by electronics (laptops, cassettes) that passengers bring on board
This is a pretty standard correlation (laptop being turned on) / causation (dimming dials) argument. We are probably looking for something that said that the laptop actually caused the dimming dials. Also, we might want to take special note of the broadening of scope in the conclusion: cassettes were not mentioned in the stimulus so how can we infer, from a premise about just laptops, that other electronics are doing the same thing?
(A) Absence of cause, absence of effect. Strengthens.
(B) ALL electronic devices emit radiation. This addresses the special note I addressed above. Strengthens.
(C) Just like (A). Strengthens.
(D) This is not the greatest strengthener as it doesn't actually show that the laptop caused the dimming dials. However, it does show that electronics can cause radio interference. Keep this for now.
(E) This has no relevance to the argument and it DEFINITELY doesn't address causation so this strengthens much less than (D) does. Eliminate (D) and choose (E), the correct answer.
