Melting of ice and thus reduced feeding opportunities for polar bears is occurring because of the A) Increase in phytoplankton population B) Drying up of lakes and streams C) Constant breaking and...

Melting of ice and thus reduced feeding opportunities for polar bears is occurring because of the A) Increase in phytoplankton population B) Drying up of lakes and streams C) Constant breaking and reforming of hydrogen bonds in water D) Increase in CO2 and other greenhouse gases in the atmosphere