Last visit was: 18 Nov 2025, 23:40 It is currently 18 Nov 2025, 23:40
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.
Close
Request Expert Reply
Confirm Cancel
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 18 Nov 2025
Posts: 105,371
Own Kudos:
Given Kudos: 99,977
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 105,371
Kudos: 778,140
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Most Helpful Reply
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 18 Nov 2025
Posts: 105,371
Own Kudos:
Given Kudos: 99,977
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 105,371
Kudos: 778,140
Kudos
Add Kudos
Bookmarks
Bookmark this Post
General Discussion
User avatar
Kavya2024
Joined: 11 Jan 2021
Last visit: 08 Nov 2025
Posts: 34
Own Kudos:
Given Kudos: 152
GMAT Focus 1: 695 Q86 V85 DI83
GMAT Focus 2: 725 Q90 V87 DI81
GPA: 4
Products:
GMAT Focus 2: 725 Q90 V87 DI81
Posts: 34
Kudos: 6
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
rvgmat12
Joined: 19 Oct 2014
Last visit: 15 Nov 2025
Posts: 356
Own Kudos:
Given Kudos: 189
Location: United Arab Emirates
Products:
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Ancient volcanoes, whose lava flows cover nearly 200,000 square miles of the Deccan region of India, thought to be one of the possible causes of dinosaur extinction.

A. thought to be
No Verb. Incorrect

B. are thought to be
Correct

C. some think them to be
Incorrect

D. some think they are
Ancient volcanoes, , some think they are.. Incorrect

E. it is thought that they are
Wordy and awkward. Incorrect

Hope this helps
User avatar
rohanpatil453
Joined: 26 Feb 2021
Last visit: 12 Dec 2024
Posts: 12
Own Kudos:
Given Kudos: 33
Location: India
GPA: 3.98
Posts: 12
Kudos: 3
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
Ancient volcanoes, whose lava flows cover nearly 200,000 square miles of the Deccan region of India, thought to be one of the possible causes of dinosaur extinction.

A. thought to be

B. are thought to be

C. some think them to be

D. some think they are

E. it is thought that they are


Option B is correct.

"Whose lava flows cover... of India, " which is a description of the volcanoes and is a modifier.

Simple trick is remove the modifer and read the remaining sentence.

Ancient Volcanoes _____ one of the possible causes of dinosaur extinction.

If you fill the answer option in the blank it should make sense.

A. thought to be - no verb (it feels like volcanoes are thinking)

B. are thought to be - correct fit

C. some think them to be - doesn't make sense

D. some think they are - doesn't make sense

E. it is thought that they are - doesn't make sense

Kudos if you think it's correct and if you like the explanation :)

Posted from my mobile device
User avatar
ramlala
Joined: 22 Aug 2020
Last visit: 13 Dec 2022
Posts: 469
Own Kudos:
Given Kudos: 30
Location: India
Concentration: International Business, Finance
GPA: 4
WE:Project Management (Energy)
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Ancient volcanoes, whose lava flows cover nearly 200,000 square miles of the Deccan region of India, thought to be one of the possible causes of dinosaur extinction.

A. thought to be
Tense error

B. are thought to be
No remarks

C. some think them to be
Verb is missing for subject Ancient volcanoes

D. some think they are
Verb is missing for subject Ancient volcanoes

E. it is thought that they are
Verb is missing for subject Ancient volcanoes
Moderators:
GMAT Club Verbal Expert
7445 posts
GMAT Club Verbal Expert
234 posts
188 posts