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

After reasoning, which of the following classes is one valid superclass of '15-oxoprostaglandin 13-oxidase [NAD(P)+] activity'?

A. prostaglandin receptor activity
B. catalytic activity
C. obsolete positive regulation of histone H4-K16 acetylation
D. regulation of actomyosin structure organization

Answer: catalytic activity