Task: Inferred Instance Class Reasoning (ontology: Sciences/Biology)

After reasoning over the ontology, which class is one valid inferred class for the instance 'gay bowel syndrome'? Context: A term that was first used by Henry L. Kazal and colleagues in 1976 to describe various sexually transmitted rectal infections seen in Kazal's proctology practice, which had many gay patients. The term is considered obsolete as the issues it describes are not gay-specific, confined to the bowel, nor a syndrome. In 2005, the U.S. Centers for Disease Control described the term as informal and no longer in use.

A. physical object
B. immaterial entity
C. medical term
D. saying

Answer: medical term