In the given figure (not drawn to scale), AB∥DC . Then the value of x is _______.
A geometric figure showing a triangle AEC. Angle A is 50 degrees. Angle E is x degrees. A line segment AB extends from A to the right. A line segment CD extends from C to the right. AB is parallel to CD. The angle formed by the extension of AC and the line CD is 100 degrees.
(A) 25∘
(B) 30∘
(C) 45∘
(D) 50∘