A subduction zone is an area where one tectonic plate sinks underneath another one. Volcanoes often form as a result. Which of the following plate collisions would most likely result in a subduction zone?
A. a piece of continental crust and a piece of oceanic crust meeting at a convergent boundary
B. a piece of continental crust and a piece of oceanic crust meeting at a divergent boundary
C. two pieces of continental crust meeting at a divergent boundary
D. two pieces of oceanic crust meeting at a divergent boundary