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

The property 'identifier issued by' applies to instances of 'tranched m b s instrument', and 't a c tranche' is a subclass of 'tranched m b s instrument'. Which class can appear as the value of 'identifier issued by' for instances of 't a c tranche'?

A. get commitment from investors
B. draw up offering memorandum
C. primary identifier issuer
D. assess pool suitability for issuance

Answer: primary identifier issuer