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

Which of the following classes is one valid superclass of 'shoot axis endodermis'?

A. endodermis
B. BO.03 late boot stage
C. B enlarged microsporocyte stage
D. IE.03 3/4 of inflorescence emerged from flag leaf sheath stage

Answer: endodermis