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

Which of the following classes does 'Telekurs security identifier scheme' belong to as one valid explicit type? Context: proprietary identification scheme for securities identifiers formerly managed by SIX Telekurs Ltd, a subsidiary of the SIX Group (Swiss Infrastructure and eXchange), now SIX Financial Information AG

A. driver's license identification scheme
B. passport number identification scheme
C. code set
D. proprietary security identification scheme

Answer: proprietary security identification scheme