A .  
Is mainly due to high concentration of CO2 in atmosphere
B .  
Is influenced by gases such as CH4, O3 and chlorofluorocarbons
C .  
Would result in the warming up of the earth
D .  
Would result in lowering the level of oceans due to high evaporation
Answer: Option D : D
Greenhouse effect would cause melting of polar ice caps and glaciers that will result in increasing the ocean levels, thereby causing submergence of low lying areas.
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