Two congruent circles centered at points A and B each pass through the other circle's center. The line containing both A and B is extended to intersect the circles at points C and D. The circles intersect at two points, one of which is E. What is the degree measure of ∠CED?<spanclass=′latex−bold′>(A)</span>90<spanclass=′latex−bold′>(B)</span>105<spanclass=′latex−bold′>(C)</span>120<spanclass=′latex−bold′>(D)</span>135<spanclass=′latex−bold′>(E)</span>150