Two charges $8C$ and $-6C$ are placed at a distance of separation $d$ between them and exerts a force of magnitude $F$ on each other. If a charge $8C$ is added to each of these and they are brought nearer to by a distance $d/3$, the magnitude of force between them will be :

Question

( A ) $\frac{2F}{3}$
( B ) $\frac{F}{3}$
( C ) $6F$
( D ) $\frac{9F}{4}$