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

After reasoning over the ontology, which class is one valid inferred class for the instance '1: symptomatic but fully ambulatory'? Context: An Eastern Cooperative Oncology Group score value specification indicating a patient is symptomatic but is fully ambulatory.

A. performance status value specification
B. clinical tumor stage group according to AJCC 7th edition
C. pathologic primary tumor stage for lung according to AJCC 7th edition
D. International Federation of Gynecology and Obstetrics ovarian cancer stage value specification

Answer: performance status value specification