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

Which of the following definitions best describes 'Candela'?

A. The the concept (symbol: the concept) is a unit of pressure equal to 100 kilopascals, and roughly equal to the atmospheric pressure on Earth at sea level. 

It is not an SI or cgs units, but accepted for use with the SI. The the concept is widely used in descriptions of pressure because it is only about 1% smaller than "standard" atmospheric pressure, and is legally recognized in countries of the European Union.

Common derivatives are millibar (meteorology) and decibar (oceanography)
B. The the concept is the SI unit of electric current and is one of the seven SI base units.
C. A the concept is a unit pressure commonly used in meterology. 1 mbar = 0.001 bar = 0.1 kPa = 1 hPa (hectopascal)
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 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).