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

Which of the following definitions best describes 'Counting:cassava mosaic disease incidence 9-month evaluation method'?

A. Calculated as weight of fresh storage roots expressed in tons per hectares per plant at harvest
B. A ratio of infected plants with spiraling whitefly to total plant stands.
C. Ratio of the number of plants showing leaf symptoms from cassava brown streak disease out of the total plant stands
D. The ratio of plants showing symptoms of cassava mosaic disease as a proportion of the total plant stands scored at seven to nine months after planting

Answer: The ratio of plants showing symptoms of cassava mosaic disease as a proportion of the total plant stands scored at seven to nine months after planting