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

The property 'has rate of return' applies to instances of 'financial instrument', and 'currency instrument' is a subclass of 'financial instrument'. Which class can appear as the value of 'has rate of return' for instances of 'currency instrument'?

A. rate of return
B. clean price
C. bid price
D. derived price

Answer: rate of return