Does the fact that YZ = WX lead to the proof that XYWZ is a parallelogram? Why or why not?

Quadrilateral W X Y Z with side X Y and opposite side W Z congruent.
A. Yes; all angles will be right angles, and so the sides are parallel.
B. No; both pairs of opposite sides can be congruent without being parallel.
C. Yes; if both pairs of opposite sides are congruent, they must also be parallel.
D. No; opposite angles may not be equal.