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

After reasoning, which of the following classes is one valid superclass of 'N-acetyl-L-aspartate-L-glutamate ligase activity'?

A. obsolete 27-hydroxycholesterol 7-alpha-monooxygenase activity
B. catalytic activity
C. regulation of exocytic insertion of neurotransmitter receptor to postsynaptic membrane
D. fructan beta-fructosidase activity

Answer: catalytic activity