When Light Travels from Air into Water

Multiple Choice

When light travels from air into water,

A) its velocity,wavelength and frequency all change.
B) its velocity changes,but its frequency and wavelength do not change.
C) its frequency changes,but its velocity and wavelength do not change.
D) its velocity and wavelength change,but its frequency does not change.
E) its wavelength changes,but its velocity and frequency do not change.