For every $$4$$ girls and $$1$$ boy, the difference is $$3$$. The difference is always divisible by $$3$$. Of the choices, only $$2013$$ is divisible by $$3$$. 
If my school has four times as many girls as boys, then the number of girls minus the number of boys \emph{could} be． 
A. $$2013$$ 
B. $$2011$$ 
C. $$2009$$ 
D. $$2008$$ 