Task: Property Constraint Reasoning (ontology: Arts_Media_Entertainment/comic_book_ontology)

The property 'material' applies to instances of 'PhysicalObject', and 'Container' is a subclass of 'PhysicalObject'. Which class can appear as the value of 'material' for instances of 'Container'?

A. Material
B. Condition
C. Grade
D. Comic

Answer: Material