Task: Class Relation Understanding (ontology: Food_Agriculture/PlantOntology)

Which of the following classes is one valid superclass of 'fruit development stage'?

A. multi-tissue plant structure development stage
B. B enlarged microsporocyte stage
C. IL.03 full inflorescence length reached stage
D. IE.03 3/4 of inflorescence emerged from flag leaf sheath stage

Answer: multi-tissue plant structure development stage