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

Which of the following definitions best describes 'plate convergence'?

A. the concept refers to natural mountain building, and may be studied as (a) a tectonic structural event, (b) as a geographical event, and (c) a chronological event. Orogenic events (a) cause distinctive structural phenomena and related tectonic activity, (b) affect certain regions of rocks and crust, and (c) happen within a specific period of time. [Wikipedia]
B. A the concept event occurs whenever plates drift apart (Plate Divergence). [Wikipedia]
C. the concept is the phenomena of two plates moving toward one another. [Wikipedia]
D. the concept is the phenomena of plates drifting apart [Wikipedia]

Answer: the concept is the phenomena of two plates moving toward one another. [Wikipedia]