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

Which of the following classes does 'G2: Moderately differentiated' belong to as one valid explicit type? Context: A histologic grade according to AJCC 7th edition indicating that the tumor cells are moderately differentiated and reflect an intermediate grade.

A. pathologic primary tumor stage for colon and rectum according to AJCC 7th edition
B. pathologic distant metastases stage for ovary according to AJCC 7th edition
C. pathologic primary tumor stage for kidney according to AJCC 7th edition
D. histologic grade according to AJCC 7th edition

Answer: histologic grade according to AJCC 7th edition