Task: Class Relation Understanding (ontology: Arts_Media_Entertainment/Propp)

Which of the following classes is the superclass of 'Origin of other features of birds' beak'?

A. 'Birds.'
B. 'Birds with magical features'
C. 'Origin and nature of bird's beak.'
D. 'Magical fowl.'

Answer: 'Origin and nature of bird's beak.'