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

The property 'P46i forms part of' applies to instances of 'E18 Physical Thing', and 'E19 Physical Object' is a subclass of 'E18 Physical Thing'. Which class can appear as the value of 'P46i forms part of' for instances of 'E19 Physical Object'?

A. E28 Conceptual Object
B. E18 Physical Thing
C. E10 Transfer of Custody
D. E5 Event

Answer: E18 Physical Thing