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

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

A. breach of contract
B. verbal contract
C. written contract
D. mutual contractual agreement

Answer: written contract