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

Which of the following classes does 'Global Industry Classification Standards scheme' belong to as one valid explicit type? Context: classification scheme that is a hierarchical four-level system classifying companies based on the principal business activity of the organization

A. industry sector classification scheme
B. indexing scheme
C. contextual identification scheme
D. birth certificate identification scheme

Answer: industry sector classification scheme