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

After reasoning over the ontology, which class is one valid inferred class for the instance 'G1 (WHO)'? Context: A histologic grade for ovarian tumor according to the World Health Organization indicating that the tumor is well differentiated.

A. histologic grade for ovarian tumor
B. pathologic distant metastases stage for colon according to AJCC 7th edition
C. pathologic lymph node stage for lung according to AJCC 7th edition
D. clinical tumor stage group according to AJCC 7th edition

Answer: histologic grade for ovarian tumor