Task: Inferred Class Relation Reasoning (ontology: Food_Agriculture/PlantOntology)

After reasoning, which of the following classes is one valid superclass of 'ligule'?

A. male archesporial cell
B. cardinal part of multi-tissue plant structure
C. radicle emergence stage
D. IL.02 1/2 inflorescence length reached stage

Answer: cardinal part of multi-tissue plant structure