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

After reasoning, which of the following classes is one valid superclass of 'Flag leaf length'?

A. Barley trait
B. HiSoilMoistSus E 1to9
C. Brown Rust susceptibility - Estimation
D. FLfWid M 1to3

Answer: Barley trait