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generis
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The comparison is betwen older automobile and newer automobiles, so the undelined portion should start with newer automobiles to establish proper comparison structure.

Eliminate A,B and E

We are left with C and D

C) newer automobiles are now using aluminum to meet new fuel efficiency standards and remain - Correct
This option starts with newer automobiles which rectifies comparison error and also conveys the correct meaning.

D) newer automobiles are now using aluminum for fuel efficiency standards, remaining - Incorrect
This option starts with newer automobiles which rectifies comparison error but the usage "now using aluminum for fuel efficiency standards" is incorrect structure, the newer automobiles uses alumunium to meet standards is the intended meaning.

Ans C
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The old automobiles should be contrasted to new automobiles in the later half of the sentence. -- Eliminate A, B and E for this reason.
C) newer automobiles are now using aluminum to meet new fuel efficiency standards and remain
The intention for using aluminium is 1. To meet new fuel standards 2. to remain competitive
This looks correct.
D) newer automobiles are now using aluminum for fuel efficiency standards, remaining
The verb+ing modifiers after comma -
Suggest the result of preceding action
OR
explain how the preceding action got done.

In this case, none of the two usase are correct.
Using aluminium does not make new automobiles competitive (It's just the intention that may or maynot be accomplished).
Remaining competitive is not the way how the automobiles use aluminum .


IMO C
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Options A, B, and E compare older automobiles to carmakers, aluminum, and new fuel efficiency standards respectively, which would be an error.

Options D states 'using aluminum for fuel efficiency standards' which comes across as illogical.

Option C is the only one that overcomes the errors mentioned above.

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In contrast to older automobiles that primarily used steel for its durability and affordability, carmakers are now turning to aluminum to meet new fuel efficiency standards, remaining competitive in the ever-changing market.


A) carmakers are now turning to aluminum to meet new fuel efficiency standards, remaining-> Why we are comparing, "older automobiles" to "carmakers". Actually, we need "newer automobiles". And, "remaining.... is incorrect". we don't need -ing modifier.

B) aluminum is now being used by carmakers to meet new fuel efficiency standards, thereby remaining-> Why we are comparing, "older automobiles" to "aluminum". Actually, we need "newer automobiles". And, "remaining.... is incorrect". we don't need -ing modifier.

C) newer automobiles are now using aluminum to meet new fuel efficiency standards and remain-> Okay! Now, comparison seems improved. Let check rest of the sentence. "meet" and "remain" is parallel too. Which makes sense. Let's keep it.

D) newer automobiles are now using aluminum for fuel efficiency standards, remaining-> Again! comparison is correct. but, "remaining.... is incorrect". we don't need -ing modifier. It means, to meet new fuel efficiency standards, newer automobiles are competitive in the ever-changing market, which doesn't make sense. Both are different lists.

E) new fuel efficiency standards have forced carmakers to turn to aluminum and remain-> Why we are comparing, "older automobiles" to "new fuel efficiency standards ". Actually, we need "newer automobiles".

So, It is C. :)
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In contrast to older automobiles that primarily used steel for its durability and affordability, carmakers are now turning to aluminum to meet new fuel efficiency standards, remaining competitive in the ever-changing market.


A) carmakers are now turning to aluminum to meet new fuel efficiency standards, remaining Incorrect

comparison error - older automobiles compare with carmakers

B) aluminum is now being used by carmakers to meet new fuel efficiency standards, thereby remaining Incorrect

comparison error - older automobiles compare with aluminum

C) newer automobiles are now using aluminum to meet new fuel efficiency standards and remain Correct

D) newer automobiles are now using aluminum for fuel efficiency standards, remaining Incorrect

modifier error - wrongly modifies using aluminum, aluminum use cant remain competitive
it doesnt intended meaning

E) new fuel efficiency standards have forced carmakers to turn to aluminum and remain Incorrect

comparison error - older automobiles compare with new fuel efficiency
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The question is testing comparison concept - Hence we need to compair/contrast between older automobiles and newer so any comparison with anything else is wrong-- Eliminate A B E

C V E -- C is parellel and the meaning comes out correct.

IMO - C
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In contrast to older automobiles that primarily used steel for its durability and affordability, carmakers are now turning to aluminum to meet new fuel efficiency standards, remaining competitive in the ever-changing market.

Comparison marker - In Contrast to Older automobiles --- Newer automobiles


A) carmakers are now turning to aluminum to meet new fuel efficiency standards, remaining

B) aluminum is now being used by carmakers to meet new fuel efficiency standards, thereby remaining

C) newer automobiles are now using aluminum to meet new fuel efficiency standards and remain

to meet and remain(correct parallelism structure)

D) newer automobiles are now using aluminum for fuel efficiency standards, remaining
, remaining competitive.. seems to be dangling modifier,, to far to modify newer automobiles..

E) new fuel efficiency standards have forced carmakers to turn to aluminum and remain[/quote]


IMO (C)
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I rejected options A,B and E primarily because of comparison errors.
I narrowed the answer options down to C and D then I rejected D because of the word "remaining".

The OA is C.
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