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

Which of the following classes is one valid superclass of 'whole plant fruit formation stage 10 to 30%'?

A. whole plant fruit formation stage
B. B enlarged microsporocyte stage
C. 4 root elongation stage
D. IE.03 3/4 of inflorescence emerged from flag leaf sheath stage

Answer: whole plant fruit formation stage