The value of $$-\frac{5}{2} + \frac{3}{2} \div 6 \times \frac{1}{2}$$ is equal to:

A

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

B

$$-\frac{1}{12}$$

C

$$-\frac{19}{8}$$

D

$$-\frac{9}{8}$$