In recent years, networks of fiber-optic cable have been : GMAT Critical Reasoning (CR)
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# In recent years, networks of fiber-optic cable have been

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Retired Moderator
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In recent years, networks of fiber-optic cable have been [#permalink]

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13 Oct 2009, 20:46
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In recent years, networks of fiber-optic cable have been replacing electrical wire for transmitting telecommunications signals. Signals running through fiber-optic cables deteriorate, and so the signals must be run through a piece of equipment called a regenerator before being transmitted farther. Light-Line is the leading manufacturer of signal regenerators. Therefore, Light-Line is one of the companies that will most benefit if new long-distance fiber-optic telecommunications networks are constructed.

Which of the following, if true, casts the most doubt on the prediction about Light-Line's prospects?

A. Telecommunications signals sent along electrical wires can travel much farther than signals transmitted through fiber-optic before needing to be regenerated.
B. Expanding its production of regenerators will require Light-Line to spend proportionately more on labor and materials.
C. The volume of signals that a fiber-optic cable can carry is several thousand times greater than the volume that can be carried by an electrical wire of similar size.
D. There are technologies that enable telecommunications signals to be transmitted without either wire or fiber-optic cable.
E. Several manufacturers are developing regenerator technologies that will allow signals to be transmitted many times farther than at present befrore requiring regeneration.

Though I do not disagree with the "OA", I don't believe my answer should be wrong either; hence, I need your reasoning behind your answer, and perhaps your thoughts will shed light into my tiny little brain. OA is
[Reveal] Spoiler:
E
and I picked
[Reveal] Spoiler:
B

I
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13 Oct 2009, 21:12
hi bakfed,

B is completely out of scope...the argument is not discussing about what effects the increased demand of regenerators will have on LL. Effects can be anything like increased cost, low profitability or more spend on labour and materials ( as in B ). However, to think in these lines is to 'assume' that LL already is benefited by the prospects. The argument precisely asks to find whether the prospects will be advantageous, if yes, then which answer choice is weakening the prospects

I hope I could 'reduce' your confusion a bit.
Retired Moderator
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14 Oct 2009, 05:44
I think I see it now. Thanks Economist
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Re: Fiber-optic cables   [#permalink] 14 Oct 2009, 05:44
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