A quadrilateral has a line of symmetry. Select all conclusions that must be true. A. All sides of the quadrilateral have the same length. B. All angles of the quadrilateral have the same measure. C. Two sides of the quadrilateral have the same length. D. Two angles of the quadrilateral have the same measure. E. No sides of the quadrilateral have the same length. F. No angles of the quadrilateral have the same measure.