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

Which of the following classes is one valid superclass of 'lower glume of pedicellate spikelet of tassel'?

A. lower glume of tassel spikelet
B. 1 main shoot growth stage
C. N second mitotic division stage in germinating pollen
D. 2 formation of axillary shoot stage

Answer: lower glume of tassel spikelet