若$$a\textless{}0$$，$$b\textgreater0$$，且$$\left\textbar{} a \right\textbar\textless{}\left\textbar{} b \right\textbar$$，则$$a+b=$$（~ ）．
选项为:A:$$\left\textbar{} b \right\textbar-\left\textbar{} a \right\textbar$$  B:$$-\left\textbar{} a \right\textbar-\left\textbar{} b \right\textbar$$  C:$$\left\textbar{} a \right\textbar-\left\textbar{} b \right\textbar$$  D:$$\left\textbar{} a \right\textbar+\left\textbar{} b \right\textbar$$  请回答其中一个选项.