In option A,B,C the term may is redundant since the term Possible is already used in the sentence.

We are left with Options D and E.

Option D consists of include melting the polar ice caps and sea levels that are rising which is wrong.

Option E is the correct answer choice.
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Possible long-term consequences of the “greenhouse effect,” the gradual warming of the Earth’s climate, may include melting the polar ice caps and a rising sea level.

A. may include melting the polar ice caps and a rising sea level
B. may include the melting of polar ice caps and the rising sea level
C. may include polar ice caps that are melting and sea levels that are rising
D. include melting the polar ice caps and sea levels that are rising melting is a verb: we need a noun
E. include melting of the polar ice caps and a rise in sea level


A, B and C are incorrect. 'May' is redundant when we have 'possible.'

E is the only correct one. POE.
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I agree with choice E.

But here I have one doubt with redundancy of possible and may. Is it always true with all auxiliary verbs such as could, may, might etc. that show possibility in sentence?
It might be possible that they had stuck up in traffic. Is it correct sentence? Answer to this will clear my doubt for life long.

Hassan

E. include melting of the polar ice caps and a rise in sea level
Pl do not mistake rise as an action verb; it is merely a linking verb. We say the sun rises in the east. However, who does the action of 'rising'? Does the sun exert itself to rise? Therefore, it is a natural phenomenon. On the contrary, if somebody raises something, it becomes an action verb. For example, we can say Gmatclub has raised the standard of GMAT performance by the candidates largely.

As you doubt, melting of the ice caps is not a complex gerund; it is just a simple gerund. However, the problem with melting is that it both an action verb and a linking verb. When we say that the melody of Asha's voice melts in the ears, it is a linking verb. When we say 'the factory melts metals into profiles' it is an action verb.

In the context, melting is the gerund of a linking verb and the 'rise; the noun of a linking verb is enough to go parallelly.
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bishal
Yes. May and possible together. are redundant.
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