The value of $$(86 \div 20) - \frac{13}{8} of \left(\frac{1}{3} - \frac{2}{13}\right) + \left(\frac{1}{8} \div \frac{3}{7}\right) + \left(2 - \frac{3}{10}\right)$$ is:

A

5

B

10

C

6

D

1