What Is the One Fundamental Difference Between X-Rays and Radio

Multiple Choice

What is the one fundamental difference between X-rays and radio waves?

A) X-rays and radio waves always come from different sources.
B) The wavelengths of X-rays and radio waves are very different.
C) The speeds of X-rays and radio waves in outer space are different.
D) Radio waves are always wavelike, whereas X-rays always behave like particles.