The line L given by $\frac{x}{5}+ \frac{y}{b} = 1$ passes through the poin (13, 32). The line $K$ is parallel to $L$ and has the equation $\frac{x}{c}+\frac{y}{3}=1$. Then the distance between $L$ and $K$ is
( A ) $\frac{23}{\sqrt{15}}$
( B ) $\sqrt{17}$
( C ) $\frac{17}{\sqrt{15}}$
( D ) $\frac{23}{\sqrt{17}}$