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

Which of the following definitions best describes 'drift ice mass'?

A. A long and narrow sheet of ice projecting out from the coastline. An the concept forms when a valley glacier moves very rapidly out into the ocean or a lake.
B. A floating mass of ice which is 1) unattached to land or land-fast ice and 2) moved by the action of winds or currents.
C. A large mass of detached land ice in the sea or stranded in shallow water.
D. An ice calf which is suspended in a water mass, being partially exposed to an atmosphere.

Answer: A floating mass of ice which is 1) unattached to land or land-fast ice and 2) moved by the action of winds or currents.