A $+15C$ charge and a $-8C$ charge are fixed on the $x-$axis at $x=0m$ and at $x=5m,$ respectively. In which region on the $x-$axis could a third charge be placed so that the net electric force on it due to the other two charges is zero?

$($A$)$ only for $x<mn>0</mn>$

$($B$)$ for

$(C)$ only for $x>5m$

$(D)$ for $x<mn>0</mn>$ and $x>5m$

$(E)$ any point $on$ the $x-$axis