Concept:A square meets all the properties of a rectangle because it has four right angles and opposite sides parallel and equal.Explanation:A rectangle has opposite sides equal and parallel, and each angle is 90°. A square has all sides equal, opposite sides parallel, and all angles 90°. So every square satisfies the conditions of a rectangle. Thus, all squares are rectangles, but not all rectangles are squares.Answer:Option A: All squares are rectangles.