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

After reasoning, which of the following classes is one valid superclass of 'all-trans-phytoene synthase activity'?

A. 2-deoxystreptamine N-acetyl-D-glucosaminyltransferase activity
B. negative regulation of dipeptide transport
C. catalytic activity
D. negative regulation of protein localization to endoplasmic reticulum

Answer: catalytic activity