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

Which of the following classes does 'Federal Reserve twelfth district identifier' belong to as one valid explicit type? Context: identifier for the twelfth district of the Federal Reserve, which represents the district governed by the Federal Reserve Bank of San Francisco

A. region-specific identifier
B. Federal Reserve district identifier
C. business center code
D. postcode

Answer: Federal Reserve district identifier