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

The property 'gutter' applies to instances of 'Sequence', and 'Panel' is a subclass of 'Sequence'. Which class can appear as the value of 'gutter' for instances of 'Panel'?

A. Thing
B. Gutter
C. Object
D. Agent

Answer: Gutter