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.
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