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# Some X-Ray Machines at Cleveland clinic require certain upgrades. Howe

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How to eliminate C? IMO it's a far better than option D because for that to work you need to assume that these workers aren't used to working at night, whereas in option C nothing needs to be assumed and it's quite obvious that without electricity or light it is impossible to fix a machine, especially at night.

Option D mentions the word 'ESPECIALLY'. It means mental alertness is generally lower in night for everyone, ESPECIALLY for people not accustomed to working at night.
Option C says MORE blackouts occur between MIDNIGHT and 8 a.m. It means blackouts occur in the daytime too. Also, it is nowhere mentioned that the upgrading requires electricity. We need to assume that upgrading requires electricity. Hence, It doesn't weaken the argument.
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Re: Some X-Ray Machines at Cleveland clinic require certain upgrades. Howe [#permalink]
A has something important to say here. If you are not paid more in the night, which is inconvenient working hours, then why bother in doing your best? = Effectiveness will be reduced.

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Pay and cost is not really relevant to “efficiency”

I believe the key to choosing D over C as the “best answer that most weakens” is, as someone mentioned above, recognizing the fact that there may be almost just as many blackouts during the day. What does “more” blackouts mean? Are there many blackouts during the day as well, and only several “more” blackouts at night?

Also, the other suspicious “clue” regarding answer C is the times chosen: 12 to 8. The answer conveniently leaves out the time period from 10 to 12, about which we know nothing about. We have to start thinking about things such as how long does it take to fix the machine and why can’t they just fix the machines during that 2 hour window when there isn’t more blackouts.

With respect to D, we are told that these technicians have a hard time during the day scheduling the repairs. If they are trying to schedule the repairs during the day, then common sense would say they must be around during the day. If they are around during the day trying to schedule repairs, it’s less of a logical leap to say they are working during these times.

In the end, since it’s not an official question, I guess there is no point torturing the answers to death. The newer 700+ questions in the O.G. seem to require a similar “common sense” approach in search of the “best answer”.

Although they are generally logically “tighter” than this question.....

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Re: Some X-Ray Machines at Cleveland clinic require certain upgrades. Howe [#permalink]
Ka boom this one thing about understanding and going back to the passage and never too lose site of the passage , cut to the chase it's quite obvious that if we had it had to be plugged into the electricity however this thing isn't explicitily stated out in passage hence i eliminated C (may be these alien creatures use solar power batteries ) i nailed down D because it was stated the repairing is highly mental da/unting and if the level of concentration is pretty doen for the technicians the it's better to complete the work in the morning thus IMO D
how to weed out other option it's easy people might just right out of context i just concentrated on the one' s that had the final2 dilemma the most common in any gmat questions
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Re: Some X-Ray Machines at Cleveland clinic require certain upgrades. Howe [#permalink]
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How to eliminate C? IMO it's a far better than option D because for that to work you need to assume that these workers aren't used to working at night, whereas in option C nothing needs to be assumed and it's quite obvious that without electricity or light it is impossible to fix a machine, especially at night.

IMHO, there is no information linked to blackouts or electricity in the prompt, so logically we cannot link it ourselves and shouldn't as it is out of scope. Perhaps, there are other solutions to blackouts such as generators and therefore we shouldn't take them into account.
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Re: Some X-Ray Machines at Cleveland clinic require certain upgrades. Howe [#permalink]

How to eliminate C? IMO it's a far better than option D because for that to work you need to assume that these workers aren't used to working at night, whereas in option C nothing needs to be assumed and it's quite obvious that without electricity or light it is impossible to fix a machine, especially at night.

­Hi,
Nowhere its mentioned in the passage that upgradation work requires electricity. They may have some backup plan just for visibility. The premise is based on DIFFICULTY and MENTAL TAXING. At night, Technicians can carry out their work with mental peace even if there are blackouts.
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Re: Some X-Ray Machines at Cleveland clinic require certain upgrades. Howe [#permalink]
Choice D states that mental alertness is lower at night (for everybody) and ESPECIALLY for people not used to working at night - this implies that alertness is lower even for people WHO ARE USED TO WORKING AT NIGHT. Thus this choice exploits on the premise that upgrades are mentally taxing anyway, and on top of that the lower alertness at night would make the job more difficult. Choice D is definitively correct.

Choice C - I also thought about this for 20-30 secs during attempting, but there is no information in the passage that allows choice C to weaken the argument - without any unwarranted assumption.
Re: Some X-Ray Machines at Cleveland clinic require certain upgrades. Howe [#permalink]
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