Task: Property Constraint Reasoning (ontology: Arts_Media_Entertainment/VideoGameOntology)

The property 'is achieved in session' applies to instances of 'Achievement', and 'hard mode' is a subclass of 'Achievement'. Which class can appear as the value of 'is achieved in session' for instances of 'hard mode'?

A. Session
B. Game
C. instantaneous event
D. Item

Answer: Session