Parallelogram ABCD is plotted on a coordinate plane so that line segment AB is parallel to line segment CD. ABCD is then rotated 45 degrees counterclockwise about the origin to form figure A'B'C'D'. Which statement must be true? Line segment A'B' is parallel to line segment AB. Line segment A'D' is parallel to line segment B'C'. Line segment A'B' is parallel to line segment B'C'. Line segment A'B' is parallel to line segment AD.