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

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

A. A clinical tumor stage group according to AJCC 7th edition indicating cancers in patients who present with distant metastases at diagnosis and with differing characteristics from IVA.
B. A clinical tumor stage group according to AJCC 7th edition indicating cancers that are smaller or less deeply invasive without regional disease or nodes.
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 IIIB.
D. 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.

Answer: A clinical tumor stage group according to AJCC 7th edition indicating cancers that are smaller or less deeply invasive without regional disease or nodes.