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

Which of the following classes does 'Citigroup Inc. common stock financial instrument short name' belong to as one valid explicit type? Context: Citigroup Inc. common stock financial instrument short name (FISN)

A. financial instrument short name
B. driver's license identifier
C. financial instrument identifier
D. tax identifier

Answer: financial instrument short name