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

Which of the following classes is one valid superclass of 'SE.07 seven nodes or internodes visible stage'?

A. 4 root elongation stage
B. stem elongation stage
C. 2.02 main shoot and axillary shoots visible at two nodes stage
D. BO.03 late boot stage

Answer: stem elongation stage