Diana says that the quadrilateral on the right is a rhombus.
Melissa says that the quadrilateral on the left is a rhombus. Who is correct?

An image shows two quadrilaterals. They are facing different directions, but each of them has two pairs of opposite sides that are parallel and equal in length.

A.
Diana is correct. Only the quadrilateral on the right has two pairs of parallel sides and all sides the same length.

B.
Melissa is correct. Only the quadrilateral on the left has two pairs of parallel sides and all sides the same length.

C.
Both are correct. Both quadrilaterals have two pairs of parallel sides and all sides the same length.

D.
Neither is correct. Neither figure has all sides the same length.