Task: Instance Class Understanding (ontology: Human_Society/EmotionOntology)

Which of the following classes does 'core' belong to as one valid explicit type? Context: Core is an instance of a grouping of terms from an ontology or ontologies. It is used by the ontology to identify main classes.

A. Subset
B. generated ontology module
C. obsolescence reason specification
D. base ontology module

Answer: Subset