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

The property 'has dividend grace period' applies to instances of 'preferred dividend', and 'adjustable rate dividend' is a subclass of 'preferred dividend'. Which class can appear as the value of 'has dividend grace period' for instances of 'adjustable rate dividend'?

A. share payment status
B. duration
C. equity position
D. voting right

Answer: duration