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

The property 'P48 has preferred identifier' applies to instances of 'E1 CRM Entity', and 'E2 Temporal Entity' is a subclass of 'E1 CRM Entity'. Which class can appear as the value of 'P48 has preferred identifier' for instances of 'E2 Temporal Entity'?

A. E42 Identifier
B. E31 Document
C. E15 Identifier Assignment
D. E12 Production

Answer: E42 Identifier