Henry made a four-sided table with equal sides and all angles measuring 90°. Which of the following statements about the possible shape of the table is true?
Statement I: It could be a parallelogram because all angles are 90° and all sides are equal.
Statement II: It could be a rectangle or a trapezoid because all angles are 90° and all sides are equal.
Statement III: It could be a square or a rhombus because all sides are equal and all angles are 90°.