Pronz wrote:
Recently, a plane crashed near the outskirts of Berlin within minutes after its takeoff from Berlin airport. Initial analysis confirmed that the crash was caused by either the usage of substandard fuel or a fault in the control board. Since the airport staff tested the control board before the plane took off, analysts hypothesize that the reason behind the plane crash was substandard fuel.
Which of the following options, if true, most strengthens the analysts’ hypothesis?
A. The black box, upon inspection, was found to belong to a generation of models more compatible with fighter planes than with passenger planes.
B. Upon enquiry, the staff at Berlin airport confirmed that they indeed checked the control board before the plane took off.
C. Using a low quality fuel can lead to engine failure and a subsequent plane crash.
D. All the testing conducted by the airport staff is done very extensively to avoid any lapses.
E. The plane belongs to the ZX3V series which contains a fuel combustion engine that is notoriously famous for explosions within minutes after takeoff.
Premise 1: A plane crashed after its takeoff.
Premise 2: Analyst: Crash reasons = the usage of substandard fuel or a fault in the control board.
Premise 3: Airport staff tested the control board before the plane took off
Conclusion: Analysts hypothesize that the reason = substandard fuel.
A. The black box, upon inspection, was found to belong to a generation of models more compatible with fighter planes than with passenger planes. ==>
new information, there are no reason for a black box to position here => WRONG B. Upon enquiry, the staff at Berlin airport confirmed that they indeed checked the control board before the plane took off.
==> challenge the premise 3=> WRONGC. Using a low quality fuel can lead to engine failure and a subsequent plane crash.
==> show that substandard fuel cause crash => MAY BE RIGHTD. All the testing conducted by the airport staff is done very extensively to avoid any lapses.
==> support for the Premise 3 and eliminate the provision that the test result may show negative result (which may cause crash), as the premise 3 do not tell exactly about the test result ==> MAY BE RIGHTE. The plane belongs to the ZX3V series which contains a fuel combustion engine that is notoriously famous for explosions within minutes after takeoff
==> this answer choice tell about another reason may cause crash and therefore Weaken the conclusion => WRONGNow we come back again to C and D
C:
When re-think, we can realize that this answer choice tell about a natural truth, but does not provide any proof that this plane use substandard fuel. Actually, it is more likely a paraphrase of the analysis. ==> WRONGThe only left one is D