Task: Property Constraint Reasoning (ontology: Business_Finance/Financial_Industry_Business_Ontology)

The property 'has transaction component' applies to instances of 'economic transaction', and 'contractual transaction' is a subclass of 'economic transaction'. Which class can appear as the value of 'has transaction component' for instances of 'contractual transaction'?

A. economic resource
B. r e a claim
C. economic contract
D. transaction event

Answer: transaction event