Task: Inferred Instance Class Reasoning (ontology: Earth_Environment/EnvironmentOntology)

After reasoning over the ontology, which class is one valid inferred class for the instance 'Kalahari Xeric Savanna Ecoregion'?

A. subsurface zone of an astronomical body
B. soil organic matter
C. aquatic ecosystem
D. ecoregion

Answer: ecoregion