Task: Inferred Instance Class Reasoning (ontology: Business_Finance/Financial_Industry_Business_Ontology)

After reasoning over the ontology, which class is one valid inferred class for the instance 'forty-eight months'? Context: duration of exactly forty-eight months, regardless of the length in days of a given calendar month, but typically 30 days

A. duration
B. calendar period
C. recurrence interval
D. time period

Answer: duration