If $$(x + y): (x - y) = 23 : 3$$ , what is the value of $$\frac{x^{2}-y^{2}}{x^{2} + y^{2}}$$?

A

$$\frac{269}{69}$$

B

$$\frac{69}{269}$$

C

$$\frac{165}{269}$$

D

$$\frac{269}{165}$$