The specifics of your question are a bit unclear, but the general approach to plotting multiple variables in one plot with ggplot graphics is to melt() the data.frame() first. I didn't follow how the points and lines are supposed to fit into your graph, but here's an approach that uses the colour parameter to plot the columns A C and G by class on the x-axis.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.