Which properties are best used prove a quadrilateral is a rhombus?

1) Show that the shape is a parallelogram with equal length sides

2) Show that the shape's diagonals are each others' perpendicular bisectors

3) Show that the shape's diagonals bisect both pairs of opposite angles.

Step-by-step explanation:

The distinguishing properties of a rhombus is that the closed shape has exactly 4 sides of equal length.