Sentence Correction

Dear Friends,

I was having problems in answering the following question.

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


Please help.

OA after some discussions.

My choice was option B.


Regards
Deano.