Final answer:
The correct option is C, as all forms of electromagnetic radiation travel at the constant speed of light in a vacuum, but differ in their wavelengths and frequencies, with an inverse relationship between the two.
Step-by-step explanation:
The correct option that compares and contrasts electromagnetic radiation is C. This is because each type of electromagnetic radiation travels in a vacuum at the same speed of light (c), which is a constant 2.998 × 108 meters per second. However, they have different wavelengths and frequencies. The wavelength and frequency of electromagnetic radiation are inversely proportional, as described by the equation c = λν, meaning that as the frequency increases, the wavelength decreases. Consequently, shorter wavelengths correlate with higher energy, which allows higher frequency radiation to penetrate matter more effectively.