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

The property 'calculation following' applies to instances of 'debt instrument yield', and 'debt yield to worst' is a subclass of 'debt instrument yield'. Which class can appear as the value of 'calculation following' for instances of 'debt yield to worst'?

A. partial calls estimation model
B. yield calculation method
C. i c m a yield formula
D. weighted average time to receipt of cashflows

Answer: yield calculation method