A Man Has Ordered a Glass of Soda in a Restaurant

A man has ordered a glass of soda in a restaurant. When his drink arrives, he notices that quite a bit of ice is floating at the top of the glass. Why does the ice float?

A) The water molecules in ice are arranged in a lattice pattern, causing ice to float.
B) The water molecules in the soda are arranged in a lattice pattern, providing a "net" on which ice can sit.
C) The water molecules in the soda are more densely packed compared to the water molecules in the ice.
D) The water molecules in the ice are more densely packed compared to the water molecules in the soda.
E) The water molecules in ice are arranged in a lattice pattern, and the water molecules in the soda are more densely packed compared to the water molecules in the ice, causing ice to float.