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

After reasoning over the ontology, which class is one valid inferred class for the instance 'G3 (WHO)'? Context: A histologic grade for ovarian tumor according to the World Health Organization indicating that the tumor is poorly differentiated.

A. International Federation of Gynecology and Obstetrics cervical cancer stage value specification
B. pathologic distant metastases stage for lung according to AJCC 7th edition
C. histologic grade according to AJCC 7th edition
D. histologic grade for ovarian tumor

Answer: histologic grade for ovarian tumor