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Technological improvements and reduced equipment costs have

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Technological improvements and reduced equipment costs have [#permalink] New post 13 Sep 2005, 04:33
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Technological improvements and reduced equipment costs have made converting solar energy directly into electricity far more cost-efficient in the last decade. However, the threshold of economic viability for solar power (that is, the price per barrel to which oil would have to rise in order for new solar power plants to be more economical than new oil-fired power plants) is unchanged at thirty-five dollars.

Which of the following, if true, does most to help explain why the increased cost-efficency of solar power has not decreased its threshold of economic viability?

(A) The cost of oil has fallen dramatically.
(B) The reduction in the cost of solar-power equipment has occured despite increased raw material costs for that equipment.
(C) Technological changes have increased the efficiency of oil-fired power plants.
(D) Most electricity is generated by coal-fired or nuclear, rather than oil-fired, power plants.
(E) When the price of oil increases, reserves of oil not previously worth exploiting become economically viable.
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 [#permalink] New post 13 Sep 2005, 05:00
C it is.

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Cheers, Rahul.

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 [#permalink] New post 13 Sep 2005, 06:39
"C" is my answer.
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 [#permalink] New post 13 Sep 2005, 07:40
C is the answer :twisted:
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 [#permalink] New post 13 Sep 2005, 07:58
C for me too
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 [#permalink] New post 13 Sep 2005, 13:20
hello Kimmy,

The answer is C. If the technological changes have made oil-fired plants more efficient, then the threshold of economic viability will be decreased, thus neutralizing the decreases in increases in efficiency of solar power plants.
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 [#permalink] New post 14 Sep 2005, 04:25
OA is indeed C
  [#permalink] 14 Sep 2005, 04:25
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