This passage discusses fundamental differences between applied-art objects and fine-art objects. A. Applied-art objects fulfill functions, such as containing or sheltering, and objects with the same function have similar characteristics because they are constrained by their purpose. B. It is easy to recognize that Shang Dynasty vases are different from Inca vases. C. Fine-art objects are not functional, so they are limited only by the properties of the materials used. D. Renaissance sculptors learned to use iron braces to strengthen the internal structures of bronze statues. E. In the twentieth century, fine artists and applied artists became more similar to one another in their attitudes toward their materials. F. In all periods, fine artists tend to challenge the physical limitations of their materials while applied artists tend to cooperate with the physical properties of their materials.