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

Which of the following definitions best describes 'Cytoplasmic male sterility - Estimation'?

A. Record maturity date, observed as onset of black spot on the bottom of the grain panicle.
B. Field observation of panicles for the presence of infertility by observing the shape of the anthers.
C. Visual assessment of grain shape.
D. Assessment of glumes adhesion.

Answer: Field observation of panicles for the presence of infertility by observing the shape of the anthers.