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

Which of the following definitions best describes 'cation exchange capacity'?

A. A physical quality which inheres in a bearer by virtue of some influence is exerted by the bearer's mass per unit size.
B. A physical quality inhering in a bearer by virtue of the bearer being derived from, part of, or otherwise dependent on the seas or oceans.
C. A physical quality which inheres in an environmental material by virtue of the material's ability to adsorb exchangeable cations.
D. A quality inhering in a bearer by virtue of the bearer's extending out above or beyond a surface or boundary.

Answer: A physical quality which inheres in an environmental material by virtue of the material's ability to adsorb exchangeable cations.