If $$\sin \theta + \cos \theta = \frac{\sqrt{11}}{3}$$, then the value of $$(\cos \theta- \sin \theta)$$ is:

A

$$\frac{\sqrt{5}}{3}$$

B

$$\frac{7}{3}$$

C

$$\frac{5}{3}$$

D

$$\frac{\sqrt{7}}{3}$$