Sentence Correction

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
E. include melting of the polar ice caps and a rise in sea level

Is it E.

Possible and May are redundant in the sentence. A,B and C can be eliminated.

B/w D and E. "melting of the polar ice" is more appropriate than "melting the polar ice". Choice E.

Great RM!! I didn't see the redundancy with the word "Possible" and the verb "May"; thanks !!

The OA is E.

The word possible makes the usage of may appropriate in this context. Article "the" is always use with geographical features and natural occurrence. examples are 'the Atlantic Ocean', the depletion of Ozone layer', the Amazon.
( melting the polar ice caps and a rising sea level in this question is a natural occurrence that is applicable to the 'greenhouse effect'). Thus, article "the" will fit in perfectly to the usage of these effects.

Option B is correct.
"may include the melting of polar ice caps and the rising sea level"