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please help

by ace001 » Thu Jun 24, 2010 1:49 pm
The time it takes for a star to change its brightness is directly related to the luminosity of it.
A. no change
B. the luminosity of its brightness
C. the luminosity of a star
D. luminosity of it
E. its luminosity

I was confused about this because I didn't know what they were trying to describe by "luminosity"--the star or the brightness.
The correct answer is E. Can you please explain why?
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by Haaress » Thu Jun 24, 2010 2:45 pm
This question is on parallelism and consicion.

Here is the extended version of the sentence.

The time it takes for a star to change its brightness is directly related to the time it takes for a star to change its luminosity.

..and here is its summarized version.

The time it takes for a star to change its brightness is directly related to its luminosity.

Hope that helps.
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by pradeepkaushal9518 » Thu Jun 24, 2010 11:49 pm
yes u need a very concise sentence

A is very long
B.wordy
C.worrdy and not clear
D.same as above
E correct and concise
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by questionbox » Fri Jun 25, 2010 2:36 am
Haaress wrote:This question is on parallelism and consicion.

Here is the extended version of the sentence.

The time it takes for a star to change its brightness is directly related to the time it takes for a star to change its luminosity.

..and here is its summarized version.

The time it takes for a star to change its brightness is directly related to its luminosity.

Hope that helps.
I agree
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by martin.jonson007 » Fri Jun 25, 2010 3:55 am
Haaress wrote:This question is on parallelism and consicion.

Here is the extended version of the sentence.

The time it takes for a star to change its brightness is directly related to the time it takes for a star to change its luminosity.

..and here is its summarized version.

The time it takes for a star to change its brightness is directly related to its luminosity.

Hope that helps.
In this is the case case, then C will be BEST...!

In E , it is not clear that ITS refer to wat .... STAR or BRIGHTNESS... (presence of its creates doubt for reader)

C option makes it clear that luminosity is of STAR not of BRIGHTNESS....!

========================

gud ques....

counter ques are there...
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by Haaress » Fri Jun 25, 2010 8:03 am
Martin,

Here is the original statment.

The time it takes for a star to change its brightness is directly related to the luminosity of it.

IMO C is incorrect because it does not obey parallelism. Additionally, the "its" before brightness does not / cannot refer to brightness but rather to the star, otherwise the author would have underlined its brightness. I am sure you'll agree with me that it is errorneous to have a possessive pronoun that modofies a noun next to each other, unless separated by a comma .

Please correct me if my agrument is flawed. Thanks!
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by jonathan123456 » Fri Jun 25, 2010 5:45 pm
Whats the OA. I feel it should be C
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by viju9162 » Fri Jun 25, 2010 6:36 pm
its cannot refer to brightness. The subject is star. Considering the rules of parallelism,

The time it takes for a star to change its brightness is directly related to its luminosity.

This will not arise any confusion in the sentence
"Native of" is used for a individual while "Native to" is used for a large group
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