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

Which of the following classes is one valid superclass of 'railroad brake, signal, or switch operator or locomotive firer'?

A. accountant or auditor (broad)
B. railroad brake, signal, or switch operator or locomotive firer (broad)
C. EL++ ontology module
D. actor, producer, or director

Answer: railroad brake, signal, or switch operator or locomotive firer (broad)