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 'NYSE American Options as service provider'? Context: NYSE (New York Stock Exchange) American Options functional entity that operates an options trading platform under the name AMEX options exchange, facilitating trading of options on domestic stocks; American depository receipts; broad-based, industry sector, and international indexes; exchange traded funds; HOLDRS; LEAPS; and equity and index FLEX options

A. third-party agent
B. responsible party
C. legal agent
D. functional business entity

Answer: functional business entity