What is the value of $$3 \sin^2 30^\circ + \frac{3}{5} \cos^2 60^\circ - 2 \sec^2 45^\circ$$?

A

$$\frac{-5}{8}$$

B

$$\frac{-25}{17}$$

C

$$\frac{-31}{10}$$

D

$$\frac{-5}{2}$$