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

The property 'P48 has preferred identifier' applies to instances of 'E1 CRM Entity', and 'E92 Spacetime Volume' is a subclass of 'E1 CRM Entity'. Which class can appear as the value of 'P48 has preferred identifier' for instances of 'E92 Spacetime Volume'?

A. E98 Currency
B. E42 Identifier
C. E16 Measurement
D. E14 Condition Assessment

Answer: E42 Identifier