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

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

A. porphyrins(?x)
B. magnesium tetrapyrrole(?x)
C. phorbines(?x)
D. metallotetrapyrrole(?x)

Answer: metallotetrapyrrole(?x)