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Along the western coast of South America, an oceanic tectonic plate is subducting beneath a continental plate. A chain of volcanoes called a continental volcanic arc is forming as a result of this process. Where is the volcanic arc located?
A.
on the boundary between the oceanic and continental plates
B.
partly on the continental plate and partly on the oceanic plate
C.
on the oceanic plate
D.
on the continental plate