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

Which of the following definitions best describes the instance 'Stage IIIB (AJCC 7th)'?

A. A clinical tumor stage group according to AJCC 7th edition indicating cancers with increasing tumor or nodal extent but less than in Stage III and with differing characteristics from IIA and IIC.
B. A clinical tumor stage group according to AJCC 7th edition indicating cancers with increasing tumor or nodal extent greater than in Stage II and with differing characteristics from IIIA and IIIB.
C. A clinical tumor stage group according to AJCC 7th edition indicating cancers with increasing tumor or nodal extent greater than in Stage II and with differing characteristics from IIIA and IIIC.
D. A clinical tumor stage group according to AJCC 7th edition indicating cancers that are smaller or less deeply invasive without regional disease or nodes.

Answer: A clinical tumor stage group according to AJCC 7th edition indicating cancers with increasing tumor or nodal extent greater than in Stage II and with differing characteristics from IIIA and IIIC.