10. Given that the points $(2,1)$ and $(5,-1)$ are on opposite sides of the line $3 y-2 x-m=0$, the range of values for $m$ is ( ).
A. $\frac{4}{3}<m<\frac{17}{3}$ B. $-13<m<-1$
C. $4<m<17$
D. $\frac{3}{2}<m<\frac{39}{2}$
10. B. Substituting the points $(2,1)$ and $(5,-1)$ into the equation of the parallel line family $3 y-2 x-m=0$, we get $m=-1$ and $m=-13$, $\therefore \quad-13<m<-1$, so the answer is B.