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

The property 'is subordinate to' applies to instances of 'written contract', and 'collateral agreement' is a subclass of 'written contract'. Which class can appear as the value of 'is subordinate to' for instances of 'collateral agreement'?

A. contract third party
B. written contract
C. breach of contract
D. contractual commitment

Answer: written contract