Task: Class Definition Understanding (ontology: Food_Agriculture/Crop_Ontology)

Which of the following definitions best describes 'Boll number'?

A. the concept (FD), estimated fibers per mm2 of SSA (seed surface area)
B. The average weight in grams of a boll
C. Weight of seed coat over weight of whole seed
D. Number of mature bolls per plant

Answer: Number of mature bolls per plant