Answer: There are quite a few origin stories on how it began, however one of them just happens to be when Fiddlin' John Carson started recording music through the covering of a pop-up studio located at 152 Nassau Street in Atlanta under Okeh Music where his recording put into motion the first efforts to push what would become the marketing for what we know as country music in 1923.
Explanation:
I don't know what u mean by primary purpose light colors but if you just asking for primary colors these are the only ones.
the roman capital was moved to the city of Byzantium which was then renamed to Constantinople after the Roman Emperor Constantine, so B.
hope this helps :D have a great day!