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

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

A. ribonucleotide(?x)
B. nucleotide(?x)
C. nucleoside 5'-triphoshate(?x)
D. purine nucleotide(?x)

Answer: nucleotide(?x)