Which of the following definitions is the most accurate about "shape"?
A. A principle of art that deals with height and width. B. An element that refers to the area between, around and/or within things. C. Triangles, squares, cylinders, rectangles, ovals, and circles. D. An element that is concerned with height and width, and that encloses space. E. An element that is concerned with depth; and that encloses space.