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

Which of the following definitions best describes the instance 'degree Celsius'?

A. A temperature unit which is equal to one kelvin degree. However, they have their zeros at different points. The centigrade scale has its zero at 273.15 K.
B. A pathologic primary tumor stage for lung according to AJCC 7th edition indicating that the tumor is more than 3 cm but not more than 5 cm in greatest dimension.
C. An International Federation of Gynecology and Obstetrics cervical cancer stage value specification indicating cervical carcinoma invades beyond the uterus, but not to the pelvic wall or to the lower third of the vagina with obvious parametrial invasion.
D. A temperature unit which is equal to 5/9ths of a kelvin. Negative 40 degrees Fahrenheit is equal to negative 40 degrees Celsius.

Answer: A temperature unit which is equal to one kelvin degree. However, they have their zeros at different points. The centigrade scale has its zero at 273.15 K.