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

Which of the following definitions best describes 'proprietary security identification scheme'?

A. formal definition of the structure and application of a ISINs as defined in ISO 6166
B. security identification scheme, defining the format and structure of a National Securities Identifying Number (NSIN), published nationally on behalf of a country
C. identifier supplied by a commercial entity
D. security identification scheme published by a commercial entity

Answer: security identification scheme published by a commercial entity