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

Which of the following definitions best describes 'TagNumber'?

A. the concept is a photometric measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle. The SI unit for the concept is candela per square metre (cd/m2).
B. the concept and spectral the concept are radiometric measures that describe the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle in a specified direction. They are used to characterize both emission from diffuse sources and reflection from diffuse surfaces. The SI unit of the concept is watts per steradian per square metre (W·sr−1·m−2).
C. provides an alphanumeric string of characters to refer to an entity. A the concept is typically used to uniquely identify an entity such as a sample or an individual specimen such as a tree or a rock sample.
D. The the concept is the SI unit of electric current and is one of the seven SI base units.

Answer: provides an alphanumeric string of characters to refer to an entity. A the concept is typically used to uniquely identify an entity such as a sample or an individual specimen such as a tree or a rock sample.