The Fact That the Speed of Light Is Constant as It

The fact that the speed of light is constant as it travels through a vacuum means that

A) photons with longer wavelengths have lower frequencies.
B) radio wave photons have shorter wavelengths than gamma-ray photons.
C) X-rays can be transmitted through the atmosphere around the world.
D) ultraviolet photons have less energy than visible photons.
E) all photons have the same wavelength.