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
答案是E 但是我感觉其中的并列成分不对称啊...而且原句中的情态动词不是不可以随意删减吗?反倒是B选项我感觉是对的....请高手解答一下!!谢谢哈~~! | 
