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

After reasoning over the ontology, which class is one valid inferred class for the instance 'pT4b (colon)'? Context: A pathologic primary tumor stage for colon and rectum according to AJCC 7th edition indicating that the tumor directly invades other organs or structures.

A. symbol
B. categorical value specification
C. MAQC data
D. independent continuant

Answer: categorical value specification