Two non-zero real numbers, $x$ and $y$, satisfy $x = 6-y$. Which of the following is a possible value of $$ \frac{{{x}^{2}}}{x-y}+\frac{{{y}^{2}}}{y-x}$$? (Adapted From 2000 AMC 12 Problems, Question \#11) 
选项为:A:$-1$  B:$-\frac{1}{2}$  C:$\frac{1}{2}$  D:$1$  E:$$2$$  请回答其中一个选项.