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Here is a detailed explanation to this question-
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With surface temperatures estimated at minus 230 degrees Fahrenheit, Jupiter's moon
Europa has long been considered far too cold to support life, and with 60 square miles of water thought to be frozen from top to bottom.
(A) Europa has long been considered far too cold to support life, and with
(B) Europa has long been considered far too cold to support life, its
(C) Europa has long been considered as far too cold to support life and has
(D) Europa, long considered as far too cold to support life, and its
(E) Europa, long considered to be far too cold to support life, and to have
Meaning is crucial to solving this problem:Understanding the intended meaning is key to solving this question; the intended core meaning of this sentence is that Europa has long been considered far too cold to support life since its 60 square miles of water are thought to be frozen from top to bottom.
Concepts tested here: Meaning + Verb Forms + Idioms• The word "considered" does not require conjunction or a helping word/phrase; “consider/considered” is always followed directly by the noun, and the similar word "regarded" must be followed by the conjunction "as"; correct usages: Jack is “considered a math genius” or Jack is “regarded as a math genius”.
A: The sentence formed by this answer choice uses the phrase "and with 60 square miles of water thought to be frozen from top to bottom"; the construction of this phrase leads to an incoherent meaning; the intended meaning is that Europa has long been considered far too cold to support life since its 60 square miles of water are thought to be frozen from top to bottom.
B: Correct. This answer choice acts upon the subject noun "Jupiter's moon Europa" with the active verb "has long been considered" to form a complete thought, leading to a complete sentence. Further, Option B uses the phrase "its 60 square miles of water thought to be frozen from top to bottom", conveying the intended meaning - that Europa has long been considered far too cold to support life since its 60 square miles of water are thought to be frozen from top to bottom. Additionally, Option B correctly and idiomatically uses the word "considered" without any helping words or phrases.
C: The sentence formed by this answer choice uses the phrase "and has 60 square miles of water thought to be frozen from top to bottom"; the construction of this phrase incorrectly implies that Europa has long been considered far too cold to support life, and as a separate action, it has 60 square miles of water thought to be frozen from top to bottom; the intended meaning is that Europa has long been considered far too cold to support life since its 60 square miles of water are thought to be frozen from top to bottom. Further, Option C incorrectly uses the unidiomatic construction "considered as"; remember, the word "considered" does not require a conjunction or a helping word/phrase; “consider/considered” is always followed directly by the noun.
D: This answer choice fails to form a complete sentence; "considered" is a past participle acting as a modifier, and "thought" is a modifier that is part of a dependent clause, so there is no active verb to act upon the subject "Jupiter's moon Europa". Further, Option D incorrectly uses the unidiomatic construction "considered as"; remember, the word "considered" does not require a conjunction or a helping word/phrase; “consider/considered” is always followed directly by the noun.
E: This answer choice fails to form a complete sentence; "considered" is a past participle acting as a modifier, and "to have" is an infinitive verb phrase, so there is no active verb to act upon the subject "Jupiter's moon Europa". Further, Option E incorrectly uses the unidiomatic construction "considered to" and "considered...to have"; remember, the word "considered" does not require conjunction or a helping word/phrase; “consider/considered” is always followed directly by the noun.
Hence, B is the best answer choice.Additional Note: Please note that in Option B "its 60 square miles of water thought to be frozen from top to bottom" serves as an absolute phrase, a phrase that modifies the entirety of the preceding clause.
All the best!
Experts' Global Team