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

Which of the following definitions best describes 'Yellow Rust susceptibility - Estimation'?

A. Observe the tendency of rachis breaking in spikes and rate it. Usually scored for H. spontaneum crosses.
B. Observe spike type and rate it.
C. Observe the host reaction to Rust, and rate it, usually scored from immune/resistant to susceptible.
D. Observe the plant susceptibility to Yellow Rust, and rate it.

Answer: Observe the plant susceptibility to Yellow Rust, and rate it.