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

Which of the following definitions best describes 'Black leaf streak disease incubation time'?

A. The date the assessment of weevil damage to the corm of the plant is conducted.
B. The time elapsed between a tagged cigar leaf at Bruns stage B of unrolling and the development of black leaf streak disease symptoms at Foures black leaf streak disease severity grade 1.
C. The number of leaves on a plant with a black leaf streak disease severity grade of 0.
D. The the concept in a standard-size excavation of 20 x 20 x 20 cm extending outwards from the corm of the plant.

Answer: The time elapsed between a tagged cigar leaf at Bruns stage B of unrolling and the development of black leaf streak disease symptoms at Foures black leaf streak disease severity grade 1.