Determine the electric dipole moment of the system of three charges, placed on the vertices of an equilateral triangle, as shown in the figure:

A

$$\sqrt{3}ql\frac{\hat{i}-\hat{j}}{\sqrt{2}}$$

B

$$-\sqrt{3}ql\hat{j}$$

C

$$2ql\hat{j}$$

D

$$(ql)\frac{\hat{i}+\hat{j}}{\sqrt{2}}$$