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

Which of the following classes does 'The Proctor & Gamble Company common stock financial instrument short name' belong to as one valid explicit type? Context: The Proctor & Gamble Company common stock financial instrument short name (FISN)

A. structured identifier
B. financial instrument short name
C. trade identifier
D. reassignable identifier

Answer: financial instrument short name