In the adjoining figure, ABCD is a cyclic quadrilateral in which AC and BD are its diagonals. If $$\angle DBC = 55^\circ$$ and $$\angle BAC = 45^\circ$$, then $$\angle BCD =$$

A

$$75^\circ$$

B

$$80^\circ$$

C

$$85^\circ$$

D

$$70^\circ$$