Quadrilateral W X Y Z is shown. Diagonals are drawn from point W to point Y and from point Z to point X and intersect at point C. The lengths of W C and C Y are congruent. Which best explains if quadrilateral WXYZ can be a parallelogram?

WXYZ is a parallelogram because diagonal XZ is bisected.
WXYZ is not necessarily a parallelogram because it is unknown if CZ = CY.
WXYZ is a parallelogram because ZC + CX = ZX.
WXYZ is not necessarily a parallelogram because it is unknown if WC = CY.