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

Which of the following classes is one valid superclass of 'microsporangium tapetum cell'?

A. 2.01 main shoot and axillary shoots visible at one node stage
B. 2.03 main shoot and axillary shoots visible at three nodes stage
C. tapetum cell
D. 2.04 main shoot and axillary shoots visible at four nodes stage

Answer: tapetum cell