Two point charges $+8 q$ and $-2q$ are located at $x=0$ and $x=L$ respectively. The location of a point on the $x$-axis at which the net electric field due to these two point charges is zero is :

Question

( A ) $\frac{L}{4}$
( B ) $2 L$
( C ) $4L$
( D ) $8L$