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

Which of the following definitions best describes 'Leaf pubescence - Estimation'?

A. Observe the host reaction to aphids, and rate it from immune/resistant to susceptible.
B. Observe leaf pubescence and rate it.
C. Observe pod colour at immature stage.
D. Usually estimated as reduction in general vigour and productivity after being continuously exposed to an average temperature of 15âˆžC for at least 15 days.

Answer: Observe leaf pubescence and rate it.