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

The property 'has measure' applies to instances of 'debt pool', and 'in assembly debts pool' is a subclass of 'debt pool'. Which class can appear as the value of 'has measure' for instances of 'in assembly debts pool'?

A. prepayment speed
B. debt securities market maker
C. native yield calculation method
D. credit spread

Answer: prepayment speed