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

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

A. death certificate
B. contract party
C. condition precedent
D. contract milestone

Answer: contract party