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

The property 'has guarantor' applies to instances of 'contract', and 'unilateral contract' is a subclass of 'contract'. Which class can appear as the value of 'has guarantor' for instances of 'unilateral contract'?

A. guarantor
B. insurance-backed guaranty
C. negative pledge
D. collateralized guaranty

Answer: guarantor