3. If the complex number $z$ satisfies $|z+3-\sqrt{3} i|=\sqrt{3}$, then the minimum value of $\arg z$ is
A. $\frac{\pi}{6}$
B. $\frac{\pi}{3}$
C. $\frac{2}{3} \pi$
D. $\frac{5}{6} \pi$
3. C $(x+3)^{2}+(y-\sqrt{3})^{2}=3, z$ lies on a circle.