Which choice correctly describes the waves in the electromagnetic spectrum?

Question

The bands within the spectrum are made of fluctuating electric and magnetic fields and have a wide range of frequencies and wavelengths.
The bands within the spectrum are made of fluctuating electric fields and have a wide range of frequencies and wavelengths.
The bands within the spectrum are made of fluctuating electric fields and have the same frequency and wavelength.
The bands within the spectrum are made of fluctuating electric and magnetic fields and have the same frequency and wavelength.
i think its D