What is the function of structure C? 
Definitions:
Porcelain
Extremely fine, hard, white ceramic. Unlike stoneware, porcelain is made from a fine white clay called kaolin mixed with ground petuntse, a type of feldspar. True porcelain is translucent and rings when struck.
Terracotta
A type of earthenware clay used in pottery and sculpture, characterized by its brownish-orange color after firing.
Earthenware
Pottery made of clay that is fired at low temperatures and is slightly porous. Also, clay figurines and statues produced in the same manner.
True View Painting
A genre of art particularly associated with Korean landscapes that emphasizes accurately capturing and portraying natural scenery.
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