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While global temperatures have risen sharply over the last century, th

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Question Stats:

46% (00:59) correct 54% (01:05) wrong based on 426 sessions

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While global temperatures have risen sharply over the last century, they have only recently eclipsed the Medieval period, during which scientists theorize that a series of volcanic eruptions sent the earth into a period of historic warmth.

A. they have only recently eclipsed the Medieval period, during which scientists theorize that a
B. they have only recently eclipsed those of the Medieval period, during which scientists theorize that a
C. it has only recently eclipsed the Medieval period, during which, scientists theorize, a
D. it has only recently eclipsed that of the Medieval period, during which scientists theorize a
E. they have only recently eclipsed those of the Medieval period, during which, scientists theorize, a
[Reveal] Spoiler: OA

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Re: While global temperatures have risen sharply over the last century, th [#permalink]

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New post 19 Mar 2017, 10:59
I was confused between B and E. Ultimately, I chose E but i am still not sure.
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Re: While global temperatures have risen sharply over the last century, th [#permalink]

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New post 19 Mar 2017, 11:07
C..they can be used for living beings..it is for inanimate

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Re: While global temperatures have risen sharply over the last century, th [#permalink]

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New post 19 Mar 2017, 12:04
I completely fail to understand the intended meaning of " they have only recently eclipsed the Medieval period"
Kindly help!!!
Thanks in advance

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While global temperatures have risen sharply over the last century, th [#permalink]

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ziyuen wrote:
While global temperatures have risen sharply over the last century, they have only recently eclipsed the Medieval period, during which scientists theorize that a series of volcanic eruptions sent the earth into a period of historic warmth.

A. they have only recently eclipsed the Medieval period, during which scientists theorize that a
B. they have only recently eclipsed those of the Medieval period, during which scientists theorize that a
C. it has only recently eclipsed the Medieval period, during which, scientists theorize, a
D. it has only recently eclipsed that of the Medieval period, during which scientists theorize a
E. they have only recently eclipsed those of the Medieval period, during which, scientists theorize, a



the main subject here is "temperatures", so we need a pronoun that refers to "temperatures" and most importantly agrees with the subject's number, so "they" in A, B and E correctly refers back to the main subject. Note: in option C and D the pronoun "it" logically refers to the noun "century", but then these options do not convey the right meaning (how can a century eclipse a period in time?), so options C and D are out.

Now let's look at options A, B and E
A -> "they" (temperatures) have only recently eclipsed the Medieval period. How can temperatures eclipse a period in time, doesn't make sense, technically a possessive pronoun is missing, so option A is out.
B -> we have the required possessive pronoun "those" but we see a meaning issue in this option, the part "during which scientists theorize" tells us that it was the Medieval period when the scientists theorized the explanation of the volcanic activity, this meaning is wrong, so option B is out
E-> the punctuation helps out in this option, this option correctly conveys the meaning that recently the scientists came up with a theory that during the medieval period the temperatures rose due to intense volcanic activity.

E wins!

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Re: While global temperatures have risen sharply over the last century, th [#permalink]

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While global temperatures have risen sharply over the last century, they have only recently eclipsed the Medieval period, during which scientists theorize that a series of volcanic eruptions sent the earth into a period of historic warmth.

A. they have only recently eclipsed the Medieval period, during which scientists theorize that aThe scientist did not theorized during the medival period but they theorised about medival period tempratures.
B. they have only recently eclipsed those of the Medieval period, during which scientists theorize that aThe sentence means that the scientist theorized during the medival period and not about the medival period.
C. it has only recently eclipsed the Medieval period, during which, scientists theorize, aThe non underlined sentence refer to the tempratures as plural so 'it' cannot be used.
D. it has only recently eclipsed that of the Medieval period, during which scientists theorize a The non underlined sentence refer to the tempratures as plural so 'it' cannot be used.
E. they have only recently eclipsed those of the Medieval period, during which, scientists theorize, aCorrect meaning

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Re: While global temperatures have risen sharply over the last century, th [#permalink]

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New post 21 Mar 2017, 12:23
Lot of commas in answer D
but i admit. D is the best option.
Wrongly selected B, but the meaning is distorted with that option
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Re: While global temperatures have risen sharply over the last century, th [#permalink]

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ziyuen wrote:
While global temperatures have risen sharply over the last century, they have only recently eclipsed the Medieval period, during which scientists theorize that a series of volcanic eruptions sent the earth into a period of historic warmth.

A. they have only recently eclipsed the Medieval period, during which scientists theorize that a
B. they have only recently eclipsed those of the Medieval period, during which scientists theorize that a
C. it has only recently eclipsed the Medieval period, during which, scientists theorize, a
D. it has only recently eclipsed that of the Medieval period, during which scientists theorize a
E. they have only recently eclipsed those of the Medieval period, during which, scientists theorize, a


OFFICIAL SOLUTION



Difficulty Level: 750-800

This problem provides two very clear decision points for you to get started:

1) "they" vs. "it" as the first word of the sentence

2) "that of" vs. "those of" vs. (no possessive) in relation to "the Medieval period"

The key to both of these is recognizing the subject of the sentence which is "global temperatures." Since temperatures is plural, the pronoun that corresponds to them must be "they" and you can eliminate choices C and D.

Then notice that the comparison is between current global temperatures and the temperatures during the Medieval period; you cannot logically compare "temperatures" with the timeframe, so you need to have "those of" (which B and D have but A does not) to properly draw the comparison.

Between A and E, notice that the only difference is commas around "during which." Why is that important? Here you're dealing with a tense/timeline decision. Since "theorize" is present-tense but the Medieval period is clearly in the past (even if you're not a historian, the fixed past tense "sent" outside the underline tells you that those volcanoes were in the past), you cannot have "scientists theorize" as part of the phrase "during which." The scientists currently theorize that volcanoes caused the global warming, so you need to separate that subject-verb from the modifier "during (the Medieval period)." This means that answer choice E is correct.
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While global temperatures have risen sharply over the last century, th [#permalink]

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New post 24 Mar 2017, 01:28
gvvsnraju@1 wrote:
I completely fail to understand the intended meaning of " they have only recently eclipsed the Medieval period"
Kindly help!!!
Thanks in advance


".. they have only recently eclipsed the Medieval period" does not make any sense - The correct option is:
"...they have only recently eclipsed those of the Medieval period".

Here "they" has been used to replace "global temperatures" and "those" has been used to replace temperatures.

This part is thus as follows:
"...global temperatures have only recently eclipsed temperatures of the Medieval period".

"Eclipsed" means "obscured". The complete sentence thus means:
Global temperatures have risen sharply over the last century - but they were never above the temperatures in the Mediaval period. Only recently global temperatures rose above (i.e. eclipsed) the temperatures of the Mediaval period.

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Re: While global temperatures have risen sharply over the last century, th [#permalink]

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New post 24 Mar 2017, 01:33
guialain wrote:
Lot of commas in answer D
but i admit. D is the best option.
Wrongly selected B, but the meaning is distorted with that option


No, Option D is wrong. The pronoun "it" does not have a singuar antecedent.

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Re: While global temperatures have risen sharply over the last century, th [#permalink]

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New post 18 Aug 2017, 14:19
hazelnut wrote:
While global temperatures have risen sharply over the last century, they have only recently eclipsed the Medieval period, during which scientists theorize that a series of volcanic eruptions sent the earth into a period of historic warmth.

A. they have only recently eclipsed the Medieval period, during which scientists theorize that a this makes an illogical comparison- temperatures to the Medieval Period when it should be the recent global temperatures to the temperatures of the Medieval period
B. they have only recently eclipsed those of the Medieval period, during which scientists theorize that a this illogically implies that scientists came up with their theory DURING the medieval period
C. it has only recently eclipsed the Medieval period, during which, scientists theorize, a incorrect use of it
D. it has only recently eclipsed that of the Medieval period, during which scientists theorize a incorrect use of it
E. they have only recently eclipsed those of the Medieval period, during which, scientists theorize, a
this correctly uses commas to illustrate that scientists developed a theory in the Medieval period in the present

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Re: While global temperatures have risen sharply over the last century, th [#permalink]

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New post 23 Aug 2017, 10:33
This question is wrong. "While" has a very specific use on the GMAT- It can not be used for comparisons. In this problem, it is being used for comparison. Plus, I believe that there should be a "that" at the end of the sentence after theorize. Thanks
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Re: While global temperatures have risen sharply over the last century, th   [#permalink] 23 Aug 2017, 10:33
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