If A and B are two events in a random experiment with $$P(A) = \frac{3}{8}, P(B) = \frac{5}{8}$$ and $$P(A \cap B) = \frac{1}{4}$$, then $$P(A \cup B) =$$

A

$$\frac{1}{4}$$

B

$$\frac{3}{4}$$

C

$$\frac{1}{2}$$

D

$$\frac{3}{5}$$