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

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

A. duration analytic
B. exchange traded bond price
C. native yield calculation method
D. prepayment speed

Answer: prepayment speed