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

Which of the following definitions best describes 'Calculate mean of petiole length'?

A. Measure inflorescence central axis from the first spike to the end from 30 randomly selected palms. Calculate mean.
B. Measure the girth or circumference of the stem at 1.5m above the ground level using a measuring tape (tape strapped around the stem), calculate mean from 30 randomly selected palms.
C. Measure petiole length from base to the most proximal leaflet from 30 randomly selected palms. Calculate standard deviation.
D. Measure petiole length from base to the most proximal leaflet on 30 randomly selected palms. Calculate mean.

Answer: Measure petiole length from base to the most proximal leaflet on 30 randomly selected palms. Calculate mean.