Which statement is true?

All parallelograms are quadrilaterals.

All parallelograms are rectangles.

All parallelograms are squares.

All parallelograms are rhombuses.

All parallelograms are quadrilaterals

All parallelograms are quadrilaterals

Step-by-step explanation:

Not all can be rectangles because the angles will sometimes be > 90° and/or < 90°.

Same reason to why it cannot always be a square.

All rhombuses are parallelogram. This is because rhombuses have two pairs of parallel sides. But only some parallelograms are rhombuses, because only some parallelograms have four equal sides.