The physical properties of the Ambum Stone have led scholars to propose which of the following theories about the work? - It must have been heavily used in its original context, because some areas of the work show significant wear from repeated grinding action. - It most likely formed part of a larger sculptural program from a temple excavated nearby. - It must have held special value for its owners, because creating it would have been extremely time consuming. - It must have been transported via a long distance trade network, because the specific type of stone it was made from is not quarried locally.