Let $$\cos(\alpha + \beta) = \frac{4}{5}$$ and let $$\sin(\alpha - \beta) = \frac{5}{13}$$, where $$0 \le \alpha, \beta \le \frac{\pi}{4}$$, then $$\tan 2\alpha =$$

A

$$\frac{56}{33}$$

B

$$\frac{19}{12}$$

C

$$\frac{20}{7}$$

D

$$\frac{25}{16}$$