A ray of light strikes the surface of a glass block, as illustrated in the diagram below. The refractive index of the glass is $1.5$. As the light ray enters the glass, its direction changes. Through what angle $x$ does the ray deviate?
- A$30^{\circ}$
- B$28^{\circ}$
- C$17^{\circ}$
- D$15^{\circ}$