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

The property 'has note' applies to instances of 'mortgage-backed security', and 'tranched m b s instrument' is a subclass of 'mortgage-backed security'. Which class can appear as the value of 'has note' for instances of 'tranched m b s instrument'?

A. m b s issuer
B. promissory note
C. FHLMC Gold pool
D. GNMA-i pool

Answer: promissory note