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

Which of the following classes does 'canary exercise convention' belong to as one valid explicit type? Context: exercise/call convention that stipulates that an option may only be exercised on predetermined dates until the first step is reached, but not after that point

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

Answer: exercise convention