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

After reasoning, which of the following classes is one valid superclass of 'positive regulation of actin filament bundle assembly'?

A. hormone metabolic process
B. regulation of supramolecular fiber organization
C. mesonephric tubule morphogenesis
D. ionotropic glutamate receptor complex

Answer: regulation of supramolecular fiber organization