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

A. primary identifier issuer
B. allocate ratings
C. define notes parameters
D. assess pool suitability for issuance

Answer: primary identifier issuer