If $$\sin(5x - 25^{\circ}) - \cos(5y + 25^{\circ})$$, where $$5x - 25^{\circ}$$ and $$5y+ 25^{\circ}$$ are acute angles, then the value of $$(x + y)$$ is:

A

$$50^{\circ}$$

B

$$40^{\circ}$$

C

$$18^{\circ}$$

D

$$16^{\circ}$$