Which of the following best describes visible light?
A. It is a part of the electromagnetic spectrum composed of segments arranged in order of wavelengths identified by the color they represent.
B. It is a small segment of the electromagnetic spectrum which can be perceived by the eyes.
C. It is a part of the electromagnetic spectrum of random arrangement, irrespective of the wavelength, and is perceived by the eyes.
D. It is the part of the electromagnetic spectrum composed of segments of the highest wavelength, which can be perceived by the eyes.