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

After reasoning, which of the following classes is one valid superclass of 'cis-3,4-dihydrophenanthrene-3,4-diol dehydrogenase activity'?

A. glycerophospholipid catabolic process
B. obsolete regulation of transposition, RNA-mediated
C. chromosomal 5-methylcytosine DNA demethylation pathway
D. catalytic activity

Answer: catalytic activity