If $$\frac{a}{b} : \frac{5}{7}$$, then what will be the value of $$\frac{\left(5a + 4b\right)}{5a - 4b}$$

A

$$\frac{11}{3}$$

B

$$\frac{7}{8}$$

C

$$\frac{5}{7}$$

D

$$\frac{3}{11}$$