Q: What happens to the crust if the moving oceanic crust reaches a deep sea trench?


Read this paragraph and choose the correct option from the provided answers:

In some places, the oceanic crust comes up to a continent. The moving crust pushes that continent away from the ridge axis as well. If the moving oceanic crust reaches a deep sea trench, the crust sinks into the mantle. The creation and destruction of oceanic crust is the reason that continents move. Seafloor spreading is the mechanism that Wegener was looking for!.

 Choices:

- ocean volcano

- it cleaves

- forms a continent

- sinks into mantle


A:
sinks into mantle