Task: Instance Class Understanding (ontology: Business_Finance/Financial_Industry_Business_Ontology)

Which of the following classes does 'American exercise convention' belong to as one valid explicit type? Context: exercise convention that stipulates that an option may be exercised anytime between the purchase date and date of expiration

A. exercise convention
B. business day convention
C. business recurrence interval convention
D. day-count convention

Answer: exercise convention