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platinum and gold

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by Megs17 » Mon Jul 23, 2012 6:03 am
Because of less availability and greater demand for scientific research, platinum remains consistently expensive, like gold.

1)Because of less availability and greater demand for scientific research, platinum remains consistently expensive, like gold.
2)Because of less availability and increased demand for scientific research, platinum remains consistently expensive, like that of gold.
3)Because of decreased availability and increased demand in scientific research, platinum remains expensive, like gold.
4)Because of decreased availability and increased demand for scientific research, platinum remains expensive, like gold.
5)Because of decreased availability and greater demand in scientific research, platinum remains at a consistently high price, like that of gold.

OA is C ,please explain why D is wrong.(sorry for teh typo in previous post)
Last edited by Megs17 on Mon Jul 23, 2012 6:35 am, edited 1 time in total.
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Source: — Sentence Correction |

by Jim@StratusPrep » Mon Jul 23, 2012 6:12 am
The one word difference in the two answers is simply one for word, you know this is an idiomatic difference. Demand for is proper.
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by lunarpower » Fri Aug 03, 2012 6:21 am
Jim@StratusPrep wrote:The one word difference in the two answers is simply one for word, you know this is an idiomatic difference. Demand for is proper.
nope -- not in this case. (note that the official answer is (c), not (d))

"demand for x" means, basically, that people want x. therefore, demand for scientific research means "lots of people want scientific research, in general, to be conducted".
the problem with that interpretation is that there's no apparent connection to platinum, so the sentence doesn't make any sense.

"demand [for y] in x" means, essentially, that people want thing y in field x. (note that, if the context is clear enough, you can omit the "for y" part.)
so, this one makes sense here: people want to use platinum in scientific research, so "demand [for platinum] in scientific research" makes sense.
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