Which of the following is true about the regions of the electromagnetic spectrum? I. Visible light waves have higher frequencies than radio waves.

II. X-rays have shorter wavelengths than visible light waves.

III. Gamma rays have lower frequencies than X-rays.

IV. Ultraviolet waves have longer wavelengths than infrared waves.

A. I, II, III, and IV
B. I and II only
C. III only
D. II and IV only