Respuesta :
Answer:
B. B. Opposite sides of the quadrilateral must be parallel and opposite angles must be congruent.
Answer: Opposite sides of the quadrilateral must be parallel and opposite angles must be congruent.
Step-by-step explanation:
If one pair of opposite sides of a quadrilateral are parallel and congruent, then the quadrilateral is a parallelogram. If both pairs of opposite angles of a quadrilateral are congruent, then the quadrilateral is a parallelogram.