It is the RGB system. It makes colors by mixing the right amounts of red, green, and blue light. Here it mixed only red and blue.
A. The others don't follow the same facts from the original phrase.
There is not one simple definition of art, i would put something along the lines of “The expression or application of emotion and imagination, typically in visual or sonic mediums, that produce appreciation for their beauty and emotional power”
Hope this was helpful!!
