Task: Inferred Instance Class Reasoning (ontology: Sciences/Computer_Science)

After reasoning over the ontology, which class is one valid inferred class for the instance 'pN0 (kidney)'? Context: A pathologic lymph node stage for kidney according to AJCC 7th edition indicating that there is no regional lymph node metastasis.

A. clause
B. categorical value specification
C. Meta data
D. directive information entity

Answer: categorical value specification