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

The property 'is denominated in' applies to instances of 'financial instrument', and 'cash instrument' is a subclass of 'financial instrument'. Which class can appear as the value of 'is denominated in' for instances of 'cash instrument'?

A. securities transaction
B. packaged financial product
C. currency
D. promissory note

Answer: currency