For what positive value of $k$ does the following system of equations have no solutions?~\uline{~~~~~~~~~~}~  $$ \begin{cases} 8 x+6 k y=17 \textbackslash\textbackslash{} k x+12 y=16 \end{cases}$$ 
选项为:A:$$2$$  B:$\frac{56}{15}$  C:$$4$$  D:$$8$$  请回答其中一个选项.