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

After reasoning, which of the following classes is one valid superclass of 'aminoglycoside phosphotransferase activity'?

A. catalytic activity
B. potassium channel activity
C. photosynthesis, light harvesting in photosystem I
D. androsterone dehydrogenase (A-specific) activity

Answer: catalytic activity