A Sculpture Made from Chocolate Gnawed by the Artist Would

A sculpture made from chocolate gnawed by the artist would challenge definitions of art because:

A) It is a physical object, but it is not made from artistic materials
B) It is made from artistic materials, but it is not a physical object
C) It is a physical object, but it is not made from permanent materials
D) It is not made from artistic materials, and it is not able to be put in a museum