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

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

A. Variable(?x)
B. CrcspDam Est 1to5(?x)
C. SPAD units(?x)
D. Plant stand at emergence(?x)

Answer: Variable(?x)