Which is true of the following statements?
Sixty percent of the Earth's fresh water is contained in the huge Antarctic ice sheet.
Summer ice loss in Antarctica was at its highest level in 1,000 years.
Ice melting from below is responsible for 35 percent of the shelf loss from 2003 to 2008.
The major ice shelves are called Ross, Filchner and Ronne, which make up one-third of Antarctica's ice shelves.