What Is the Difference Between Visible Light and X-Rays

Multiple Choice

What is the difference between visible light and X-rays?

A) Speed; X-rays go faster than visible light.
B) Speed; X-rays go slower than visible light.
C) Wavelength; X-rays have a shorter wavelength than visible light.
D) Wavelength; X-rays have a longer wavelength than visible light.
E) X-rays are made up of particles, while visible light is made up of waves.