Suppose that $x$ and $y$ are nonzero real numbers such that $\frac{5 x+y}{x-4y}=-1$. What is the value of $\frac{x+3 y}{3 x-y}$? (Adapted From 2017 AMC 10B Problems, Question \#4) 
选项为:A:$$2$$  B:$$5$$  C:$$7$$  D:$$9$$  E:$$11$$  请回答其中一个选项.