According to Piaget, children have acquired the cognitive skill of conservation when they're able to
a. understand the viewpoint of other people.">A. understand the viewpoint of other people.B. realize that the term heavy describes an object one way and the term big describes it another way.">B. realize that the term heavy describes an object one way and the term big describes it another way.C. understand that six ounces of liquid in a jar and six ounces in an elongated tube are ...
