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

After reasoning, which of the following classes is one valid superclass of 'calcium ion transmembrane transport via low voltage-gated calcium channel'?

A. diarylpropane peroxidase activity
B. flavonol-3-O-triglucoside O-coumaroyltransferase activity
C. negative regulation of conidiophore development
D. monoatomic cation transport

Answer: monoatomic cation transport