A very small electric dipole of dipole moment $$p$$ lies along the x axis, i.e. $$\vec p=p\hat i$$, in a non-uniform electric field $$\vec E=\frac{c}{x}\hat i$$, where $$c$$ is a constant. The force on the dipole is

A

$$\frac{cp}{x^2}\hat i$$

B

$$-\frac{cp}{x^2}\hat i$$

C

$$\frac{cp}{x}\hat i$$

D

zero