Which of the following are characteristics of conservation in school-aged children? (Select All that Apply.)

A. This reflects a lack of understanding of conservation, as cutting a sandwich does not increase the quantity of food. B. This belief shows a misunderstanding of conservation, where children may not recognize that the volume remains constant regardless of the container's shape. C. Understanding that the amount of a substance remains the same even if its appearance changes is a key characteristic of conservation. D. Recognizing that a ball of clay can be flattened and rolled back into a ball without changing its amount also demonstrates an understanding of conservation. E. This belief indicates a misunderstanding of conservation, as the amount of liquid does not change based on the height or width of the container.