Task: SWRL-based Rule Reasoning (ontology: Food_Agriculture/Crop_Ontology)

Suppose an individual ?x satisfies: SpkDen E 1to3(?x). Which conclusion is one valid inferred conclusion?

A. Variable(?x)
B. Quality traits(?x)
C. Malt friability - Measurement(?x)
D. Lemma pigmentation - Estimation(?x)

Answer: Variable(?x)