Find x so that \[{{\left( \frac{5}{3} \right)}^{-5}}\times {{\left( \frac{5}{3} \right)}^{-11}}={{\left( \frac{5}{3} \right)}^{8x}}\]

• A.  \[-\,4\]                         
• B.  \[-\,2\]   
• C.  \[-\,6\]                         
• D.  \[-\,8\]