If '$$+$$' is '$$\times$$', '$$-$$' is '$$+$$', '$$\times$$' is '$$\div$$' and '$$\div$$' is '$$-$$',then what will be the value of the following expression? 

$$6 + \frac{2}{3} - \frac{1}{2} \div \frac{3}{4} \times 9$$

A

$$\frac{35}{21}$$

B

$$\frac{53}{12}$$

C

$$\frac{35}{12}$$

D

$$\frac{53}{21}$$