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

The property 'has tranche type' applies to instances of 'structured finance instrument', and 'principal protected note' is a subclass of 'structured finance instrument'. Which class can appear as the value of 'has tranche type' for instances of 'principal protected note'?

A. c d o origination objective
B. tranche type
C. trigger event
D. arbitrage cdo objective

Answer: tranche type