What is the value of $$(\frac{1}{3}-\cot\ 60^\circ)$$ ?

A

$$\frac{(2-\sqrt3)}{2\sqrt3}$$

B

$$\frac{(\sqrt2-1)}{\sqrt2}$$

C

$$\frac{(1-\sqrt3)}{3}$$

D

$$\frac{(\sqrt3-4)}{2\sqrt3}$$