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

Which of the following classes is one valid superclass of 'beginning of whole plant fruit ripening stage'?

A. BO.03 late boot stage
B. IE.03 3/4 of inflorescence emerged from flag leaf sheath stage
C. 4 root elongation stage
D. whole plant fruit ripening stage

Answer: whole plant fruit ripening stage