Simplify $$\frac{1 - \frac{3}{7} \div \frac{9}{49} \times \frac{3}{14}}{1 + \frac{3}{5} \div \frac{1}{25} \times \frac{1}{30}}$$.

A

$$\frac{1}{7}$$

B

$$\frac{1}{6}$$

C

$$\frac{1}{3}$$

D

$$\frac{1}{5}$$