A and B are the end points of the longest line drawn in the circle with centre x. If C is a point on the circle such that AC = Ax = 3. Then the perimeter of $$\triangle ABC$$ is

A

$$\frac{9\sqrt{3}}{2}$$

B

9

C

$$6 + 3\sqrt{3}$$

D

$$9 + 3\sqrt{3}$$