Task: Inferred Class Relation Reasoning (ontology: Food_Agriculture/Crop_Ontology)

After reasoning, which of the following classes is one valid superclass of 'Harvest index'?

A. Barley trait
B. Spike basal sterility presence - Estimation
C. AwnTipPigPre E 0to1
D. 1-5 Lemma colour scale

Answer: Barley trait