Task: SWRL-based Rule Reasoning (ontology: Earth_Environment/EnvironmentOntology)

Suppose an individual ?x satisfies: nitrite(?x). Which conclusion is one valid inferred conclusion?

A. organonitrogen compound(?x)
B. nitrogen oxoanion(?x)
C. arsenic oxoanion(?x)
D. nitro compound(?x)

Answer: nitrogen oxoanion(?x)