Task: Instance Class Understanding (ontology: Sciences/Computer_Science)

Which of the following classes does 'G3 (WHO)' belong to as one valid explicit type? Context: A histologic grade for ovarian tumor according to the World Health Organization indicating that the tumor is poorly differentiated.

A. histologic grade for ovarian tumor according to the World Health Organization
B. Eastern Cooperative Oncology Group score value specification
C. independent continuant
D. software interface

Answer: histologic grade for ovarian tumor according to the World Health Organization