example C: I wonder if in 50 year's time we'll still have the saying "THAT'S A CARBON COPY" because then people will probably have no idea what carbon copy sheets were used for and if they existed even!
example C: I wonder if in 50 year's time we'll still have the saying "THAT'S A CARBON COPY" because then people will probably have no idea what carbon copy sheets were used for and if they existed even!