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

Which of the following definitions best describes 'security identifier'?

A. generic, nine-digit alpha numeric code which identifies a fungible security, assigned by a national numbering agency under the ISO 6166 standard
B. any publicly available identifier that is used to identify a security
C. identifier supplied by a commercial entity
D. security identifier that is defined as specified in ISO 6166, Securities and related financial instruments -- International securities identification numbering system (ISIN)

Answer: any publicly available identifier that is used to identify a security