The value of $$18 \div [26 - \left\{25 - (15 - 5) \div 2\right\}] of 12 + 2 - 2 \div 4 \times 16$$ is:

A

$$-\frac{23}{4}$$

B

$$\frac{3}{2}$$

C

$$\frac{9}{4}$$

D

$$-\frac{25}{2}$$