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 at a 30° angle 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 nice = 1.30. Which outgoing ray is the correct one?

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