133. Whereas heat transferred between the ocean and the atmosphere occurs more rapidly when the ocean is warmer than the air, it is slow when the ocean is colder.
A. Whereas heat transferred between the ocean and the atmosphere occurs more rapidly when the ocean is warmer than the air, it is slow when the ocean is colder.
B. Unlike the slow process of heat transfer between the ocean and the atmosphere when the ocean is colder than the air, heat transfers more rapidly when the ocean is warmer.
C. The transfer of heat between the ocean and the atmosphere is slow when the ocean is colder than the air and more rapid when the ocean is warmer.
D. Transferring heat between the ocean and the atmosphere occurs slowly when the ocean is colder than the air and more rapidly when it is warmer.
E. When the ocean is colder than the atmosphere, heat transferred between them occurs slowly, unlike the more rapid transfer occurring when the ocean is warmer.

This is GMATPREP question. I chose B but this is not OA. What is wrong with "B". What is the correct answer and reason that the same is better than "B".

C here is correct.

Saurabh malpani

i'm wondering where you really got this question - if it's actually a gmatprep problem, why is there a problem number (#133)?

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choice b is wrong because it contains a faulty comparison: unlike the slow process of heat transfer... improperly modifies heat (the noun after the comma).
as a simpler analogy, consider the following sentence:
coming home from school, the wind blew me off my bike.
in that sentence, the wind is coming home from school (obviously not what is meant). the problem is the same as what's wrong with the problem in this thread.

Ron can u mention all the errors on wrong options??
thanks

choice a:
- if you take out modifiers, the basic structure of this sentence is 'whereas heat ... occurs more rapidly when blah blah blah, it is slow when blah blah blah.' that's unacceptable - it's not the heat that 'happens' (it's the transfer). remember that the gmat is very exacting about wording that means what it's supposed to mean.

choice d:
- 'transferring... occurs' is bad idiom (you can't use occurs with the gerund form)
- the 'it' toward the end of this choice is technically ambiguous (could theoretically refer to 'transferring' or 'ocean', or perhaps even 'air')

choice e:
- awkward phrasing in general (if you're a native speaker, you should definitely notice this)
- same problem as in choice a: the sentence says that the heat 'occurs slowly', which doesn't make any sense

Hey Ron,



i didn't get this part ??

I crossed D as I thought its a dangling modifier... there is no subject to which transferring is applicable...
but i understand now that...transferring itself is the subject...

but didn't get what u have written about gerund forms... is this true for all gerunds and singular verbs ??