A Light Ray Strikes a Hexagonal Ice Crystal Floating in the Air

Multiple Choice

A light ray strikes a hexagonal ice crystal floating in the air perpendicular to one face,as shown below.The hexagonal faces of the crystal are perpendicular to the plane of the page.All the rays shown are in the plane of the page,and n_ice = 1.30.Which outgoing ray is correct when the incoming ray strikes the crystal face on the left head on?

A) A
B) B
C) C
D) D
E) E