Task: Inferred Instance Class Reasoning (ontology: Business_Finance/Financial_Industry_Business_Ontology)

After reasoning over the ontology, which class is one valid inferred class for the instance 'Standard & Poor's Composite Index'? Context: equity index that is calculated based on the float-adjusted market capitalization of approximately 500 large companies listed on stock exchanges in the United States

A. economic indicator
B. price analytic
C. reference index
D. market spread

Answer: reference index