Task: Inferred Class Relation Reasoning (ontology: Business_Finance/Occupation_Ontology)

After reasoning, which of the following classes is one valid superclass of 'holder of regulated occupation activity'?

A. food preparation or serving related occupation holder
B. retail sales worker
C. furnace, Kiln, oven, drier, or Kettle operator or tender (broad)
D. material entity

Answer: material entity