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

The property 'has tradable unit' applies to instances of 'collective investment vehicle', and 's i c a v' is a subclass of 'collective investment vehicle'. Which class can appear as the value of 'has tradable unit' for instances of 's i c a v'?

A. preferred share in fund
B. fund share class unit
C. equity portfolio
D. fund unit

Answer: fund unit