满足$$\left\textbar{} \left\textbar{} x-1 \right\textbar-\left\textbar{} x \right\textbar{} \right\textbar-\left\textbar{} x-1 \right\textbar+\left\textbar{} x \right\textbar=1$$的$$x$$的值是．
选项为:A:$$0$$  B:$$\pm \frac{1}{4}$$  C:$$\frac{3}{4}$$  D:$$\pm \frac{3}{4}$$  请回答其中一个选项.