Believed to Originate from a Small Area on their Foreheads, Elephants GMAT Sentence Correction

Question: Believed to originate from a small area on their foreheads, elephants emit low-frequency sounds that may be used as a secret language to communicate with other members of the herd.

(A) Believed to originate from a small area on their foreheads, elephants emit low-frequency sounds that may be used
(B) Elephants emit low-frequency sounds that are believed to originate from a small area on their foreheads, and they may use this
(C) Elephants emit low-frequency sounds, believed to originate from a small area on their foreheads, that they may use
(D) Originating, it is believed, from a small area on their foreheads; elephants emit low-frequency sounds they may use
(E) Originating, it is believed, from a small area on their foreheads, low-frequency sounds are emitted by elephants that may be used

“Believed to originate from a small area on their foreheads, elephants emit low-frequency sounds that may be used” - is a GMAT sentence correction question. These types of questions contain grammatical errors in the underlined sentence, and we have to choose the correct statement from the options. GMAT sentence correction is part of GMAT verbal.

Answer: C
Explanation:

The following arguments could support the suggested change to the sentence:

• Parallelism
• Considering two distinct facts
• Modifiers

This is how the sentence is put together:

Elephants are thought to produce low-frequency sounds from a small spot on their foreheads, which they may employ as a kind of communication with other herd members.

Let’s check the options one by one -

Option A is incorrect:
A is an incorrect answer. Due to the SV dispute, answer option A is not acceptable.

Option B is incorrect:
Option B is the incorrect choice. The word "this" at the conclusion of the sentence denotes a single noun, while "sounds" or "these" would have been more appropriate when the noun is plural.

Choice C is correct:
Option C is the correct choice. Try to read the statement without the second clause by ignoring it. It will still make sense logically. However,It is not totally certain if that is the best course of action. No new errors are introduced, and SV and modifier errors are fixed.

Choice D is incorrect:
D is an incorrect choice. This phrase erroneously joins an independent clause to a dependent clause. Hence, D can be eliminated.

Choice E is incorrect:
This is the incorrect choice. This phrase links a dependent clause and an independent clause incorrectly. Eliminate the choice E.

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