Why does ice float on water?

A) Ice is hydrophobic and repels water.
B) Water molecules have less mass as they become colder.
C) Water molecules are spaced farther apart in ice than in liquid water.
D) Vibrating electrons in liquid water push ice to the surface.
E) Hydrogen bonds are weaker in ice.

Hydrogen Bonds

Weak bonds between two molecules caused by the electrostatic attraction between a proton in one molecule and an electronegative atom in the other.

Hydrophobic

Relating to or having a fear of water; in chemistry, refers to substances that repel water.

Vibrating Electrons

Electrons in motion, typically referring to the movement within atomic or molecular orbitals which can lead to the emission of photons.