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

Which of the following definitions best describes 'PhiPS2 Measurement'?

A. Standard method for spectral reflectance.
B. Maximum quantum yield of PSII measured from a light adapted leaf.
C. Standard method for fluorescence measurement.
D. Measured as weight by percentage of all matter remaining above a 2 mm slotted screen ? 40 shakes in the direction of the slots.

Answer: Standard method for fluorescence measurement.