OFFICIAL EXPLANATION



• INTRO notes

Option A is grammatical but really awful stylistically.

More quickly and faster are both grammatical.
In fact, quickly is the adverb, so if we want to say that something freezes faster, we need the adverb and we say more quickly.
("More quickly" probably just sounds a little strange, in part because there is an adjective, quicker, that confuses people, and in part because usually comparisons are not set up with this many words.

As mentioned, quicker is an adjective (meant for a noun). More quickly is correct to modify a verb.

THE PROMPT



THE OPTIONS


• Wow this sentence is heavy and long. Blah.
• GMAC very rarely uses X does ABC more quickly in comparison/in relation to Y
• I see no grammatical errors but this sentence is a stylistic disaster: long phrases, extra words, and sluggish prose. KEEP, but look for a better choice


• Well, option A definitely got shortened—although now the sentence is incoherent
• option B does not finish the comparison between hot water and cold water. The sentence is nonsensical
Eliminate B


• the verb would is used for conditionals or hypotheticals.
• but this sentence is not a conditional or a hypothetical.
• the sentence is not saying that cold water would heat more quickly than warm water [if some condition were met.] Wrong verb.
Eliminate C


• This option forms the comparisons correctly and is concise
KEEP and compare to (A) at the end


• "the opposite is true"? What does this clause mean?
• I think that "the opposite is true" probably means that hot water does NOT freeze faster than cold water, and now we have a sentence that makes no sense.
• this option is cryptic and confusing
Eliminate E

Compare option A and option D
A: hot water freezes more quickly in comparison to cold water
D: hot water freezes faster than cold water

A: cold water heats more quickly in relation to warm water
D: cold water heats faster than warm water

Option D is much better than A: comparisons are direct and brisk, and D says exactly what A says but does so in fewer words.

The best answer is D


COMMENTS

suchithra , welcome to SC Butler.

As always, I am happy to see posts from a range of people, from veterans to brand new.

I am very pleased to see many of you starting to trust yourselves and to rely on a combination of grammar rules, meaning, style, and common sense/logic when you answer questions.
It does not matter if you make an incorrect assumption here and there.
Rules you can learn.
Reasoning you must train for. And it certainly looks as though you are all doing exactly that. Nice work.

P.S. Today I will give kudos past the OA mark . . . but I probably will not do so again.
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Question tests comparisons. First split up can be done using the first clause. The right idiom is X more than Y or X than Y. So A and B can be eliminated.
E can be eliminated because its not as clear as C & D. Opposite could be anything : hot water warms slower than cold water or cold water freezes slower than Hot water.
Between C and D. C is incorrect because would denotes possibility whereas its already discovered.

A) more quickly in comparison to cold water; the researchers who investigated this effect also discovered that cold water heats more quickly in relation to warm water

B) faster; the researchers who investigated this effect also discovered that cold water heats faster

C) more quickly than cold water; the researchers who investigated this effect also discovered that cold water would heat more quickly than warm water

D) faster than cold water; the researchers who investigated this effect also discovered that cold water heats faster than warm water

E) faster than cold water; the researchers who investigated this effect also discovered that the opposite is true

MEANING
Researchers who investigated the M effect ("hot water FREEZES faster than cold water") also discovered that "cold water HEATS faster than hot water" and named that the inverse M effect.

X freezes faster than Y, means that the freezing rate of X is greater than that of Y.
X freezes more quickly than Y, means the same thing, but this is less concise than the former option.

A) "more quickly in comparison to" unidiomatic; "more quickly in relation to" unidiomatic and unintended;
B) "hot water freezes faster"…than what? missing what is hot water being compared to; also "cold water heats faster"… than?
C) "more quickly than" less concise; "cold water WOULD" imps the effect doesn't happen anymore, nonsense;
E) "opposite is true" what is the opposite? this could imply many things, (ie. cold freezes slower than hot?) unclear;

Answer (D)

So I am not absolutely sure but I guess "more quickly" is redundant.
Also the fact that when you have usage of faster it is definitely more concise than more quickly.
For this reason I would get rid of A and C.

Even though B has no grammar based errors, The removal of compared to "hot/cold water" is not right. We cannot just say faster. So that takes care of B.



The only difference between D and E is at the end. E says "the opposite is true". Though it is true it is very unlikely that the author will leave it to the reader to assume what is the opposite. Unless it is a very simple (cannot come up with an example).

For this reason D is the best choice.
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The “Mpemba effect” refers to the fact that hot water freezes more quickly in comparison to cold water; the researchers who investigated this effect also discovered that cold water heats more quickly in relation to warm water and named that phenomenon the “inverse Mpemba effect.”


A) more quickly in comparison to cold water; the researchers who investigated this effect also discovered that cold water heats more quickly in relation to warm water

B) faster; the researchers who investigated this effect also discovered that cold water heats faster --unclear; hot water freezes faster than what?; cold water heats faster than what? warm water or hot water?

C) more quickly than cold water; the researchers who investigated this effect also discovered that cold water would heat more quickly than warm water

D) faster than cold water; the researchers who investigated this effect also discovered that cold water heats faster than warm water -- correct; and provide clear information

E) faster than cold water; the researchers who investigated this effect also discovered that the opposite is true-- not the opposite

Therefore, D

Generis I have a doubt . When comparing actions

Should we use does or did at the end of sentence.

Eg: should we have to
Hari runs faster than John
Hari runs faster than John does.

Same as the above example.
In the sentence above we should be saying :
Hot water freezes faster than cold water does.

Or is it just hot water freezes faster than cold water.

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