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

Which of the following definitions best describes 'passport number identification scheme'?

A. system for allocating identifiers to birth certificates
B. system for allocating identifiers to driver's, operating, or non-driver identification documents
C. system for allocating identifiers to national identification numbers
D. system for allocating identifiers to passports

Answer: system for allocating identifiers to passports