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honchos
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honchos
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Hi honchos,

The best way to attack this question is to break down the sentence.

We can see that this is a compound sentence because of the ", but". A compound sentence contains two independent clauses joined by a coordinator. The coordinators are as follows: for, and, nor, but, or, yet, so. (Helpful hint: The first letter of each of the coordinators spells FANBOYS.) Except for very short sentences, coordinators are always preceded by a comma.

This indicates that we should have two complete sentences on either side of the coordinator. Let's focus on the second sentence. The subject is "force". The verb (underlined) is "cause". These do not agree. Thus, we can already eliminate answer choice (A). Note the first answer choice in Sentence Correction on the GMAT is always what's underlined in the question. We can also eliminate (B) for the same reason.

Answer choice (C) has a verb that agrees with the subject, and sounds good.

Answer choice (D) is incorrect because the verb "may generate" is modifying "force" instead of "contractions", as intended. The sentence is trying to say that the contractions may generate enough heat to melt ice. The phrase "causing contractions" is used to describe the subject, "force". Answer choice (E) is incorrect for the same reason as (D); the verb is modifying the wrong noun.

Hope this helps!

THE SUBJECT is gravitational force- singular only C has the correct verb-causes.
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On the surface of Jupiter's moon Europa, water remains frozen, but the gravitational force of Jupiter and its other moons cause contractions that may generate so much heat that it would melt ice below Europa's surface.

A). moons cause contractions that may generate so much heat that it would melt
B). moons cause contractions, with enough heat generated for melting : That's not the intention of sentence.
but it is " gravitational force of X and y cause contraction that may generate so much heat that it would melt ice below Europa's surface.

C). moons causes contractions that may generate enough heat to melt
D). moons, causing contractions, may generate so much heat to melt : Verb-ing is wrong.Verb-ing always modifies action of the sentence before comma, here it is just subject.

E). moons, which causes contractions, may generate enough heat for melting : again it changes the intention of the sentence. It is the contraction that generate heat not gravitational force.
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On the surface of Jupiter's moon Europa, water remains frozen, but the gravitational force of Jupiter and its other moons cause contractions that may generate so much heat that it would melt ice below Europa's surface.

A). moons cause contractions that may generate so much heat that it would melt
Subject is "the gravitational force" - singular so the verb requires to be singular - "cause" is NOT

B). moons cause contractions, with enough heat generated for melting
Subject is "the gravitational force" - singular so the verb requires to be singular - "cause" is NOT

C). moons causes contractions that may generate enough heat to melt
Error in Option A is rectified here

D). moons, causing contractions, may generate so much heat to melt
Meaning change : now the sentence is saying that gravitational force is generating Heat (and more so it is generating deliberately to melt the ice)

E). moons, which causes contractions, may generate enough heat for melting
Meaning change : now the sentence is saying that gravitational force is generating Heat (and more so it is generating deliberately to melt the ice)
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On the surface of Jupiter's moon Europa, water remains frozen, but the gravitational force of Jupiter and its other moons cause contractions that may generate so much heat that it would melt ice below Europa's surface.

(A) moons cause contractions that may generate so much heat that it would melt - wordy
(B) moons cause contractions, with enough heat generated for melting - for melting is incorrect , as "to melt" is needed to convey a purpose
(C) moons causes contractions that may generate enough heat to melt - correct
(D) moons, causing contractions, may generate so much heat to melt - wordy and "causing concentrations" is incorrectly used
(E) moons, which causes contractions, may generate enough heat for melting - incorrect usage of which
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On the surface of Jupiter's moon Europa, water remains frozen, but the gravitational force of Jupiter and its other moons cause contractions that may generate so much heat that it would melt ice below Europa's surface.

(A) moons cause contractions that may generate so much heat that it would melt ->"of Jupiter and its other moons" is prepositional phrase. Subject is "the gravitational force", so we need singular verb. "Cause" is incorrect to use.
(B) moons cause contractions, with enough heat generated for melting -> Same as A.
(C) moons causes contractions that may generate enough heat to melt -> Subject verb agreement is corrected. So, meaning wise, contractions may generate enough heat...". It makes sense. Let's keep it.
(D) moons, causing contractions, may generate so much heat to melt -> Now, " the gravitational force" is generating heat. It is not the intended meaning. Incorrect.
(E) moons, which causes contractions, may generate enough heat for melting -> Now, Moons are causing contractions and " the gravitational force" is generating heat. Incorrect.

So, I think C. :)
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On the surface of Jupiter's moon Europa, water remains frozen, but the gravitational force of Jupiter and its other moons cause contractions that may generate so much heat that it would melt ice below Europa's surface

Please is the subject only "gravitational force" but not "gravitational force and its other moons"
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On the surface of Jupiter's moon Europa, water remains frozen, but the gravitational force of Jupiter and its other moons cause contractions that may generate so much heat that it would melt ice below Europa's surface.

This is one of the good examples of sentence correction that tests on elegance of sentence formation.
Let’s break it to parts and understand the question.

(A) moons cause contractions that may generate so much heat that it would [past tense)melt
Entire sentence is in present tense, so there is no point to use -would . Also, it’s lengthy compared to option C

(B) moons cause contractions, with enough heat generated for melting
For melting - may not right to use. Contractions generate enough heat . But here it’s like heat generated by its own. Looks meaningless. Eliminate.

(C) moons causes contractions that may generate enough heat to melt
That - vital noun modifier - modifies contractions . Meaning wise, it is perfect and elegant.

(D) moons, causing contractions, may generate so much heat to melt

So much heat- not a great word. Contractions generate heat but not moons etc generate heat. Eliminate D

(E) moons, which causes contractions, may generate enough heat for melting
Long , for meting - idiomatic error. C is much better.
So, C should be the answer.

#believeinurself

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IMO C.

cause should be singular for singular subject ( gravitational force)
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