Help. ​

Parallelogram

A quadrilateral is a parallelogram if:

Both pairs of opposite sides are parallel. (By definition).

Or:

Both pairs of opposite sides are congruent. If they are congruent, they must also be parallel.

Or:

One pair of opposite sides are congruent and parallel. Then, the other pair must also be parallel.

Based on the above, do you see the answer, NTS   ????