Well, considering the other two are not reasonable you can rule out B and C as possible answers. Most light that we interact with is in the form of white light, which contains many or all of these wavelength ranges and, the Sun is a natural source for visible light waves and our eyes see the reflection of this sunlight off the objects around us
White light is visible light, and it contains all the colors of the rainbow, from red to violet. The range of visible wavelengths is 400 to 700 nanometers. ... Gamma rays are the most energetic light waves found on the electromagnetic spectrum.
