Task: Class Definition Understanding (ontology: Earth_Environment/EnvironmentOntology)

Which of the following definitions best describes 'subtropical desert biome'?

A. A montane desert ecosytem which is in its climactic successional state.
B. .A tropical desert ecosytem which is in its climactic successional state
C. .A temperate desert ecosytem which is in its climactic successional state
D. .A subtropical desert ecosytem which is in its climactic successional state.

Answer: .A subtropical desert ecosytem which is in its climactic successional state.