In a circle with centre O, ABDC is a cyclic quadrilateral with AB as a diameter of the circle. AC and BD produced meet at E. If $$\angle$$CED = $$70^\circ$$, then what is the measure of $$\angle$$COD ?

A

$$40^\circ$$

B

$$45^\circ$$

C

$$30^\circ$$

D

$$60^\circ$$