A bridge is shown. A quadrilateral is outlined. It has one pair of opposite sides that is parallel. Which best describes the structure outlined in the bridge. It is a parallelogram because it has one pair of opposite sides that is parallel. It is a parallelogram because it has exactly one pair of opposite sides that is congruent. It is a trapezoid because it has exactly one pair of opposite sides that is congruent. It is a trapezoid because it has exactly one pair of opposite sides that is parallel.