Discussion
The modern theory of plate tectonics states
Answer: D
All three statements are part of plate tectonic theory: new oceanic crust is created at mid-ocean ridges and the continents drift as the plates move; convection currents in the mantle drive that motion; and the oceanic crust is destroyed at subduction zones where one plate descends beneath another.
Creation, driving mechanism and destruction together make one coherent theory, so the combined choice is correct.
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