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

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

A. contractual definition
B. term sheet
C. contractual commitment
D. duration

Answer: duration