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

The property 'is aggregate of' applies to instances of 'debt pool statistical measure', and 'absolute prepayment rate' is a subclass of 'debt pool statistical measure'. Which class can appear as the value of 'is aggregate of' for instances of 'absolute prepayment rate'?

A. russian yield formula
B. simple yield calculation method
C. current yield calculation method
D. debt pool statistical measure

Answer: debt pool statistical measure