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

Which of the following definitions best describes 'Barley leaf rust incidence'?

A. Stripe rust (yellow rust) incidence/severity/response in the plants caused by the agent Puccinia striiformis f.sp. tritici.
B. the concept in the plants caused by the agent Puccinia hordei.
C. the concept in the plants.
D. Bunt incidence in the plants caused by the agent Tilletia tritici (stinking bunt, covered smut, hill bunt, complete bunt, low bunt, high bunt).

Answer: the concept in the plants caused by the agent Puccinia hordei.