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

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

A. inorganic hydride(?x)
B. elemental carbon(?x)
C. inorganic hydroxy compound(?x)
D. elemental hydrogen(?x)

Answer: elemental hydrogen(?x)