Task: Class Definition Understanding (ontology: Earth_Environment/OBOE)

Which of the following definitions best describes 'Celsius'?

A. The degree the concept is a unit of thermodynamic temperature with the same magnitude as the unit kelvin but where absolute zero (0 Kelvin) is defined as -273.15 degrees the concept.
B. Ratio of two quantities as the concept composition (1:100).
C. The the concept is the SI unit of electric current and is one of the seven SI base units.
D. The the concept is the SI base unit of luminous intensity, i.e., the power emitted by a light source in a particular direction, weighted by the luminosity function (a standardized model of the sensitivity of the human eye to different wavelengths).

Answer: The degree the concept is a unit of thermodynamic temperature with the same magnitude as the unit kelvin but where absolute zero (0 Kelvin) is defined as -273.15 degrees the concept.