Final answer:
RGB color television and computer displays emit all colors by using red, green, and blue light. By mixing different intensities of these primary colors, all other colors can be generated.
Step-by-step explanation:
RGB color television and computer displays use red, green, and blue light to emit all colors. By mixing different intensities of these three primary colors, all other colors can be generated. When the red, green, and blue light beams are combined at full intensity, they create white light, which is the sum of all visible colors. Therefore, the correct answer is 1) Red, Blue, Green.