A and B are the endpoints of a line segment. Segment AB is crossed through point C by another line segment with endpoints D and E. If ∠ACD > 90?, and the sum of ∠ACE and ∠BCD is x, then which of the following must be true?
A.x < 90
B.x > 90
C.90 < x < 180
D.x < 180
E.x > 180