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 'non agency z tranche' is a subclass of 'tranched m b s instrument'. Which class can appear as the value of 'identifier issued by' for instances of 'non agency z tranche'?

A. close deal
B. draw up tranche termsheets
C. define pool characteristics
D. primary identifier issuer

Answer: primary identifier issuer