Task: Class Relation Understanding (ontology: Business_Finance/Occupation_Ontology)

Which of the following classes is one valid superclass of 'helper-brickmason, blockmason, stonemason, or tile or marble setter'?

A. administrative services or facilities manager
B. helper, construction trades
C. accountant or auditor (broad)
D. actor, producer, or director

Answer: helper, construction trades