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

After reasoning over the ontology, which class is one valid inferred class for the instance 'pN1 (colon)'? Context: A pathologic lymph node stage for colon and rectum according to AJCC 7th edition indicating metastasis in 1-3 regional lymph nodes.

A. web service
B. Digital gene expression (DGE) datasets
C. LC-MS data
D. categorical value specification

Answer: categorical value specification