If $$\frac{a}{b} = \frac{4}{5}$$ and $$\frac{b}{c} = \frac{15}{16}$$, then $$\frac{c^{2} - a^{2}}{c^{2} + a^{2}}$$ is:

A

$$\frac{3}{25}$$

B

$$\frac{6}{25}$$

C

$$\frac{7}{25}$$

D

$$\frac{9}{25}$$