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

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

A. inorganic hydroxy compound(?x)
B. inorganic hydride(?x)
C. inorganic molecular entity(?x)
D. hydrogen atom(?x)

Answer: inorganic molecular entity(?x)