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

Which of the following definitions best describes 'snow cover'?

A. In plate tectonic theory earth history, at its simplest, is one of plates rifting into pieces diverging apart and new ocean basins being born, followed by motion reversal, convergence back together, subduction of the oceanic crust, plate collision, and mountain building. This cycle of opening and closing ocean basins is the Wilson Cycle . [Wikipedia]
B. A fog the droplets of which freeze upon contact with exposed objects and form a coating of rime and/or glaze.
C. The depth of snow that has fallen.
D. A measure (or condition) of height, especially of great height, as a mountain top or aircraft flight level.

Answer: The depth of snow that has fallen.