Last visit was: 19 Nov 2025, 08:53 It is currently 19 Nov 2025, 08:53
Home
GMAT
Messages
Tests
Schools
Events
Rewards
Chat
My Profile
Close
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
Back to Forum
Create Topic
   1   2   3   
505-555 Level|   Grammatical/Rhetorical Construction|   Subject Verb Agreement|                     
User avatar
generis
User avatar
Senior SC Moderator
Joined: 22 May 2016
Last visit: 18 Jun 2022
Posts: 5,272
Own Kudos:
37,389
 [3]
Given Kudos: 9,464
Expert
Expert reply
Posts: 5,272
Kudos: 37,389
 [3]
A surge in new home sales and a drop in weekly unemployment claims 16 Mar 2018, 16:59
3
Kudos
Add Kudos
Bookmarks
Bookmark this Post
DevilDoggNC
The Official Guide for GMAT Review, 2015

Practice Question
Question No.: SC 16
Page: 674
A surge in new home sales and a drop in weekly unemployment claims suggest that the economy might not be as weak as some analysts previously thought.

(A) claims suggest that the economy might not be as weak as some analysts previously thought

(B) claims suggests that the economy might not be so weak as some analysts have previously thought

(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts

(D) claims, suggesting about the economy that it might not be so weak as previously thought by some analysts

(E) claims, suggesting the economy might not be as weak as previously thought to be by some analysts
Show more

sajon
why option A is not used as subjunctive as "suggest that" is given.
Show more
sajon , I can understand why you might think the phrase "suggest that" indicates or requires a subjunctive construction.

Those two words are markers for the subjunctive mood.

But use of the verb suggest does not automatically mean that a subjunctive phrase will follow.

Suggest, as a verb, is used in many ways.
In the subjunctive mood, "suggest that" implies some sort of desire, command, or request.

Desire, command, and request are not present here.

The surge and the drop do not recommend that ______. The surge and the drop do not desire, command, request, or prefer.

The verb suggest can be used in many ways. It is not restricted to the subjunctive.

"Suggest that" here is used in the sense of "hint at, imply, show."

• His red face suggests [that] he is embarrassed.
• The shape of that package suggests [that] something breakable is inside.
• Water in the desert suggests an oasis.
• The data suggested an outcome different from the one scientists had predicted.

You could remove "that" in the first two sentences and they would still be grammatically correct.

With the sentence in the prompt, you could also remove the word "that."

This sentence means
Good Thing A (increased home sales) and Good Thing B (decreased unemployment) indicate that the economy is doing better than some analysts believed.

Or: Good Thing A and Good Thing B hint that the economy might be in better health than analysts thought.

In sum, in this sentence, suggest that does not require the subjunctive.

Hope that helps.
avatar
Muskan01
avatar
Joined: 16 May 2017
Last visit: 11 Aug 2019
Posts: 8
Own Kudos:
2
Given Kudos: 11
Posts: 8
Kudos: 2
A surge in new home sales and a drop in weekly unemployment claims 29 Sep 2018, 22:35
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hello everyone,

Need help in understanding how does the first part underlined not have a main verb? My understanding is that "surge" and "drop" are verbs.

A surge in new home sales and a drop in weekly unemployment claims suggest that the economy might not be as weak as some analysts previously thought
User avatar
DmitryFarber
User avatar
Manhattan Prep Instructor
Joined: 22 Mar 2011
Last visit: 08 Nov 2025
Posts: 3,020
Own Kudos:
8,563
 [1]
Given Kudos: 57
Expert
Expert reply
GMAT Focus 1: 745 Q86 V90 DI85
Posts: 3,020
Kudos: 8,563
 [1]
A surge in new home sales and a drop in weekly unemployment claims 29 Sep 2018, 23:37
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
"Surge" and "drop" *can* be verbs, but like many words, they can have more than usage. Any time you see a word preceded by an article (a/an/the), it is either a noun or a modifier preceding a noun: "a kick in the gut," "the signing of the Declaration of Independence," "the last blow to my self-esteem," etc.
avatar
Muskan01
avatar
Joined: 16 May 2017
Last visit: 11 Aug 2019
Posts: 8
Own Kudos:
2
Given Kudos: 11
Posts: 8
Kudos: 2
A surge in new home sales and a drop in weekly unemployment claims 30 Sep 2018, 00:36
Kudos
Add Kudos
Bookmarks
Bookmark this Post
DmitryFarber
"Surge" and "drop" *can* be verbs, but like many words, they can have more than usage. Any time you see a word preceded by an article (a/an/the), it is either a noun or a modifier preceding a noun: "a kick in the gut," "the signing of the Declaration of Independence," "the last blow to my self-esteem," etc.
Show more

A word is preceded by "a" or "an" or "the" it is either a noun or modifier to a noun. Is it a universal rule and true for every single case? Please confirm
User avatar
DmitryFarber
User avatar
Manhattan Prep Instructor
Joined: 22 Mar 2011
Last visit: 08 Nov 2025
Posts: 3,020
Own Kudos:
8,563
Given Kudos: 57
Expert
Expert reply
GMAT Focus 1: 745 Q86 V90 DI85
Posts: 3,020
Kudos: 8,563
A surge in new home sales and a drop in weekly unemployment claims 30 Sep 2018, 01:01
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I'm always nervous about declaring anything a universal rule, since there are often odd little exceptions, but no exceptions come to mind on this one. I think you're safe to apply this universally. The whole point of articles is to introduce nouns. In some languages (such as Swedish), the article is actually part of the noun itself!
User avatar
EMPOWERgmatVerbal
User avatar
EMPOWERgmat Instructor
Joined: 23 Feb 2015
Last visit: 17 Feb 2025
Posts: 1,694
Own Kudos:
15,175
 [3]
Given Kudos: 766
Expert
Expert reply
Posts: 1,694
Kudos: 15,175
 [3]
A surge in new home sales and a drop in weekly unemployment claims 18 Oct 2018, 13:14
2
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
Hello Everyone!

Let's take a look at this sentence, one issue at a time, to determine which option is the right answer! First, here's the original question, with the major differences between options highlighted in orange:

A surge in new home sales and a drop in weekly unemployment claims suggest that the economy might not be as weak as some analysts previously thought.


(A) claims suggest that the economy might not be as weak as some analysts previously thought
(B) claims suggests that the economy might not be so weak as some analysts have previously thought
(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts
(D) claims, suggesting about the economy that it might not be so weak as previously thought by some analysts
(E) claims, suggesting the economy might not be as weak as previously thought to be by some analysts

A quick glance over the options tells us we have 2 major issues to deal with:

1. Verb Tense: suggest / suggests / suggesting
2. Active vs. Passive Voice: some analysts previously thought / previously thought by some analysts

Let's start with #1 on our list: verb tense. We need to make sure that the verb agrees with the subject, and that we're not creating an accidental sentence fragment:

(A) claims suggest that the economy might not be as weak as some analysts previously thought

This is OKAY because it uses a plural verb for a plural subject (A surge in new home sales and a drop in weekly unemployment claims).

(B) claims suggests that the economy might not be so weak as some analysts have previously thought

This is INCORRECT because it uses a singular verb for a plural subject, which doesn't agree in number!

(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts

This is OKAY because it uses a plural verb for a plural subject (A surge in new home sales and a drop in weekly unemployment claims).

(D) claims, suggesting about the economy that it might not be so weak as previously thought by some analysts

This is INCORRECT because by changing "suggest" to the gerund "suggesting," it eliminates the verb from the sentence - making this a sentence fragment!

(E) claims, suggesting the economy might not be as weak as previously thought to be by some analysts

This is INCORRECT because by changing "suggest" to the gerund "suggesting," it eliminates the verb from the sentence - making this a sentence fragment!

We can eliminate options B, D, and E because they don't use the right verb tense/form to agree with the subject.

Now that we're left with 2 options, let's take a look at #2 on our list: active vs. passive voice. Whenever possible, we MUST use active voice over passive voice. Active voice is clearer, less wordy, and always preferred on the GMAT.

(A) claims suggest that the economy might not be as weak as some analysts previously thought

This is CORRECT! It uses the correct verb tense (suggest) and uses active voice!

(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts

This is INCORRECT because it uses passive voice instead of active voice, which is a major no-no on the GMAT!

There you go - option A was the correct choice all along!


Don't study for the GMAT. Train for it.
User avatar
icandoit1995
User avatar
Joined: 10 Sep 2019
Last visit: 28 Apr 2020
Posts: 10
Own Kudos:
7
Given Kudos: 73
Posts: 10
Kudos: 7
A surge in new home sales and a drop in weekly unemployment claims 11 Feb 2020, 14:00
Kudos
Add Kudos
Bookmarks
Bookmark this Post
EMPOWERgmatVerbal

Could you explain to me whether the answer C will be correct if it is changed to this
claims suggest that the economy might not be as weak as HAS (instead of have) been previously thought by some analysts
Thank you so much
User avatar
EMPOWERgmatVerbal
User avatar
EMPOWERgmat Instructor
Joined: 23 Feb 2015
Last visit: 17 Feb 2025
Posts: 1,694
Own Kudos:
15,175
 [1]
Given Kudos: 766
Expert
Expert reply
Posts: 1,694
Kudos: 15,175
 [1]
A surge in new home sales and a drop in weekly unemployment claims 17 Feb 2020, 12:10
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
icandoit1995
EMPOWERgmatVerbal

Could you explain to me whether the answer C will be correct if it is changed to this
claims suggest that the economy might not be as weak as HAS (instead of have) been previously thought by some analysts
Thank you so much
Show more

Hello icandoit1995!

Thank you for your question!

Unfortunately, changing have to has won't fix option C. The problem with option C isn't the verb - it's that the phrase "have been previously thought by some analysts" is written in passive voice. The GMAT prefers active voice, so option A is our best option.

If you have any more questions, please feel free to tag me at EMPOWERgmatVerbal and I'll be happy to help!
User avatar
kornn
User avatar
Joined: 28 Jan 2017
Last visit: 18 Dec 2021
Posts: 357
Own Kudos:
93
Given Kudos: 832
Posts: 357
Kudos: 93
A surge in new home sales and a drop in weekly unemployment claims 02 May 2020, 06:04
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Dear GMATGuruNY AjiteshArun MartyTargetTestPrep VeritasPrepHailey IanStewart GMATNinja GMATRockstar EducationAisle,

Q1. I reject choice C. because of incorrect tense usage.
(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts

"previously" indicates that the tense should be past tense (WAS previously thought), not present perfect tense as is currently written here (HAVE BEEN previously thought)

Is my reasoning correct?

***Q2. SO weak as in choice B. and D. is not wrong, right?
Can the explanation in this link https://gmatclub.com/forum/so-many-as-m ... 16032.html apply here in this question?
User avatar
DmitryFarber
User avatar
Manhattan Prep Instructor
Joined: 22 Mar 2011
Last visit: 08 Nov 2025
Posts: 3,020
Own Kudos:
8,563
 [1]
Given Kudos: 57
Expert
Expert reply
GMAT Focus 1: 745 Q86 V90 DI85
Posts: 3,020
Kudos: 8,563
 [1]
A surge in new home sales and a drop in weekly unemployment claims 30 Jun 2020, 00:46
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
varotkorn

Q1. Yes, the present perfect is wrong, and if we did want to use it, we'd have to say "as has been thought." The verb is referring to the previous concept (the weakness of the economy), and this concept can't be plural.

Q2. "So weak . . . as thought" doesn't work. However, the proposed rule in the link you provide isn't the only valid way to use "so (adverb or adjective) as." One fairly normal usage is to say "so X as to Y." For instance, we might say "this beetle is so rare as to be practically unknown" or "we tried not to visit so often as to arouse suspicion."
User avatar
CrackverbalGMAT
User avatar
Major Poster
Joined: 03 Oct 2013
Last visit: 19 Nov 2025
Posts: 4,844
Own Kudos:
8,945
Given Kudos: 225
Affiliations: CrackVerbal
Location: India
Expert
Expert reply
Posts: 4,844
Kudos: 8,945
A surge in new home sales and a drop in weekly unemployment claims 26 Sep 2020, 04:29
Kudos
Add Kudos
Bookmarks
Bookmark this Post
[quote="DevilDoggNC"]A surge in new home sales and a drop in weekly unemployment claims suggest that the economy might not be as weak as some analysts previously thought.


(A) claims suggest that the economy might not be as weak as some analysts previously thought

(B) claims suggests that the economy might not be so weak as some analysts have previously thought

(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts

(D) claims, suggesting about the economy that it might not be so weak as previously thought by some analysts

(E) claims, suggesting the economy might not be as weak as previously thought to be by some analysts

This question is based on Subject-Verb agreement and Construction.

The subject of the sentence is not ‘claims’ or ‘surge’ as the first look at it might suggest. The subject is “A surge in new home sales and a drop in weekly unemployment claims”. Since there are two noun phrases joined by the conjunction ‘and’, the subject is plural and must be followed by a verb also in the plural – suggest.

When we do a vertical scan of the options, we se that Options A and C contain the verb ‘suggest’. However, Option C has the bulky, awkward phrase “have been thought to be”. Option A is more straightforward and has the correct comparison – “as weak as some analysts previously thought”. So, Option C can be eliminated. Option A is grammatically and logically appropriate.

Option B contains the singular from of the verb – suggests – which causes subject-verb disagreement. It also contains the wrong tense – have thought. The present perfect tense is not required in this sentence. So, Option B can be eliminated.

Options D and E are both sentence fragments; the latter half of the sentence – “suggesting about the economy……” – is a participle phrase, which might modify the first part of the sentence but does not complete the sentence. Both the options are lacking a verb for the subject. Furthermore, the modifier in D is wordy and awkward. So, Options D and E can also be eliminated.

Therefore, Option A is the most appropriate option.

Jayanthi Kumar.
User avatar
ashmit99
User avatar
Joined: 20 Feb 2019
Last visit: 09 Apr 2025
Posts: 91
Own Kudos:
38
Given Kudos: 192
Location: India
Schools: Oxford Said'25 (II) LBS '26 (A)
GPA: 3.2
Products:
My Reviews
Schools: Oxford Said'25 (II) LBS '26 (A)
Posts: 91
Kudos: 38
A surge in new home sales and a drop in weekly unemployment claims 30 Apr 2021, 21:13
Kudos
Add Kudos
Bookmarks
Bookmark this Post
DevilDoggNC
A surge in new home sales and a drop in weekly unemployment claims suggest that the economy might not be as weak as some analysts previously thought.


(A) claims suggest that the economy might not be as weak as some analysts previously thought

(B) claims suggests that the economy might not be so weak as some analysts have previously thought

(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts

(D) claims, suggesting about the economy that it might not be so weak as previously thought by some analysts

(E) claims, suggesting the economy might not be as weak as previously thought to be by some analysts


The Official Guide for GMAT Review, 2015

Practice Question
Question No.: SC 16
Page: 674
Show more

Hello experts,

What is the meaning of "so x as Y"? And is the usage correct here?

Thank you!

VeritasKarishma GMATNinja generis AndrewN
User avatar
CEdward
User avatar
Joined: 11 Aug 2020
Last visit: 14 Apr 2022
Posts: 1,203
Own Kudos:
272
Given Kudos: 332
Posts: 1,203
Kudos: 272
A surge in new home sales and a drop in weekly unemployment claims 30 Apr 2021, 21:20
Kudos
Add Kudos
Bookmarks
Bookmark this Post
ashmit99
DevilDoggNC
A surge in new home sales and a drop in weekly unemployment claims suggest that the economy might not be as weak as some analysts previously thought.


(A) claims suggest that the economy might not be as weak as some analysts previously thought

(B) claims suggests that the economy might not be so weak as some analysts have previously thought

(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts

(D) claims, suggesting about the economy that it might not be so weak as previously thought by some analysts

(E) claims, suggesting the economy might not be as weak as previously thought to be by some analysts


The Official Guide for GMAT Review, 2015

Practice Question
Question No.: SC 16
Page: 674

Hello experts,

What is the meaning of "so x as Y"? And is the usage correct here?

Thank you!

VeritasKarishma GMATNinja generis AndrewN
Show more

The correct idiom, one that occurs quite often, is "as [adjective] as" not "so [adjective] as".

The use of the former properly invokes a comparison. In this case, the comparison is between two things: the strength of the economy as suggested by the surge in home sales and the strength of the economy that analysts previously thought about.
User avatar
ashmit99
User avatar
Joined: 20 Feb 2019
Last visit: 09 Apr 2025
Posts: 91
Own Kudos:
38
 [1]
Given Kudos: 192
Location: India
Schools: Oxford Said'25 (II) LBS '26 (A)
GPA: 3.2
Products:
My Reviews
Schools: Oxford Said'25 (II) LBS '26 (A)
Posts: 91
Kudos: 38
 [1]
A surge in new home sales and a drop in weekly unemployment claims 30 Apr 2021, 21:27
Kudos
Add Kudos
Bookmarks
Bookmark this Post
CEdward
ashmit99
DevilDoggNC
A surge in new home sales and a drop in weekly unemployment claims suggest that the economy might not be as weak as some analysts previously thought.


(A) claims suggest that the economy might not be as weak as some analysts previously thought

(B) claims suggests that the economy might not be so weak as some analysts have previously thought

(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts

(D) claims, suggesting about the economy that it might not be so weak as previously thought by some analysts

(E) claims, suggesting the economy might not be as weak as previously thought to be by some analysts


The Official Guide for GMAT Review, 2015

Practice Question
Question No.: SC 16
Page: 674

Hello experts,

What is the meaning of "so x as Y"? And is the usage correct here?

Thank you!

VeritasKarishma GMATNinja generis AndrewN

The correct idiom, one that occurs quite often, is "as [adjective] as" not "so [adjective] as".

The use of the former properly invokes a comparison. In this case, the comparison is between two things: the strength of the economy as suggested by the surge in home sales and the strength of the economy that analysts previously thought about.
Show more

Thanks for your reply.

Do you know what so as means?
avatar
AndrewN
avatar
Volunteer Expert
Joined: 16 May 2019
Last visit: 29 Mar 2025
Posts: 3,502
Own Kudos:
7,511
Given Kudos: 500
Expert
Expert reply
Posts: 3,502
Kudos: 7,511
A surge in new home sales and a drop in weekly unemployment claims 01 May 2021, 03:54
Kudos
Add Kudos
Bookmarks
Bookmark this Post
ashmit99
Hello experts,

What is the meaning of "so x as Y"? And is the usage correct here?

Thank you!

VeritasKarishma GMATNinja generis AndrewN
Show more

CEdward
The correct idiom, one that occurs quite often, is "as [adjective] as" not "so [adjective] as".

The use of the former properly invokes a comparison. In this case, the comparison is between two things: the strength of the economy as suggested by the surge in home sales and the strength of the economy that analysts previously thought about.
Show more

ashmit99
Thanks for your reply.

Do you know what so as means?
Show more
Hello, ashmit99. There is at least one case in which so or as can work: so/as much as. However, the two expressions convey different meanings, as explained in this post. Could you swap out the word much for weak to get so weak as? If you find yourself uncomfortable with the idiom but are unsure of it, then count it as a doubt, but do not eliminate the answer right away. Rely on other features of the answer choice if you can to make a more informed decision. It is rare that a GMAT™ SC question will come down to nothing more than one idiom, particularly in more modern questions.

- Andrew
User avatar
Sneha2021
User avatar
Joined: 20 Dec 2020
Last visit: 10 Jun 2025
Posts: 314
Own Kudos:
38
Given Kudos: 522
Location: India
Posts: 314
Kudos: 38
A surge in new home sales and a drop in weekly unemployment claims 19 Feb 2023, 02:35
Kudos
Add Kudos
Bookmarks
Bookmark this Post
KarishmaB

(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts

Why C is incorrect?
Please help to understand the sentence structure.

Thanks!
User avatar
EMPOWERgmatVerbal
User avatar
EMPOWERgmat Instructor
Joined: 23 Feb 2015
Last visit: 17 Feb 2025
Posts: 1,694
Own Kudos:
15,175
Given Kudos: 766
Expert
Expert reply
Posts: 1,694
Kudos: 15,175
A surge in new home sales and a drop in weekly unemployment claims 19 Feb 2023, 17:57
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Sneha2021


(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts

Why C is incorrect?
Please help to understand the sentence structure.

Thanks!
Show more

Hello Sneha2021,

Happy to help.

The problem with option C isn't the verb - it's that the phrase "have been previously thought by some analysts" is written in passive voice. The GMAT prefers active voice, so option A is our best option.

If you have any more questions, please feel free to tag me at EMPOWERgmatVerbal and I'll be happy to help!
User avatar
KarishmaB
User avatar
Joined: 16 Oct 2010
Last visit: 18 Nov 2025
Posts: 16,267
Own Kudos:
76,994
 [1]
Given Kudos: 482
Location: Pune, India
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 16,267
Kudos: 76,994
 [1]
A surge in new home sales and a drop in weekly unemployment claims 19 Feb 2023, 23:36
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Sneha2021
KarishmaB

(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts

Why C is incorrect?
Please help to understand the sentence structure.

Thanks!
Show more

This is the structure of option (C): X and Y suggest that the economy might not be as weak as have been previously thought by some analysts.

Is the use of 'have' correct here? No, we need the singular 'has'.

What has been previously thought? That the economy is very weak. (It's a single thought)
but now, X and Y suggest that it may not be as weak as previously thought.

Even with the use of 'has' in option (C), option (A) is better because it is direct and active.
User avatar
DmitryFarber
User avatar
Manhattan Prep Instructor
Joined: 22 Mar 2011
Last visit: 08 Nov 2025
Posts: 3,020
Own Kudos:
8,563
Given Kudos: 57
Expert
Expert reply
GMAT Focus 1: 745 Q86 V90 DI85
Posts: 3,020
Kudos: 8,563
A surge in new home sales and a drop in weekly unemployment claims 27 Feb 2023, 20:15
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Yes, the problem is definitely with "have." Passive voice is very often used correctly on the GMAT, and in many cases it's actually needed. I'd only eliminate a passive construction if it ruined the meaning or structure of the sentence.
User avatar
ExpertsGlobal5
User avatar
Experts' Global Representative
Joined: 10 Jul 2017
Last visit: 19 Nov 2025
Posts: 5,195
Own Kudos:
4,765
Given Kudos: 43
Location: India
GMAT Date: 11-01-2019
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 5,195
Kudos: 4,765
A surge in new home sales and a drop in weekly unemployment claims 28 Feb 2023, 06:15
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Sneha2021
KarishmaB

(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts

Why C is incorrect?
Please help to understand the sentence structure.

Thanks!
Show more

Hello Sneha2021,

We hope this finds you well.

To answer your query, the primary error in Option C is that it incorrectly refers to the singular noun "economy" with the plural noun "have been...thought".

We hope this helps.
All the best!
Experts' Global Team
   1   2   3   
Moderators:
GMATNinja
GMAT Club Verbal Expert
7443 posts
GMATNinjaTwo
GMAT Club Verbal Expert
231 posts
miag
189 posts