Answer:
C.) oceanic crust is forced downward as one plate moves under another .
Step-by-step explanation:
Subduction is described as follows:
C. As one plate slides under another, the oceanic crust is pushed below.
At convergent plate borders, where two plates are moving towards one another, subduction takes place. The less dense oceanic plate will be forced to sink beneath the denser plate whenever an oceanic plate strikes a continental plate or another oceanic plate. Earthquakes, volcanic arcs, and deep-sea trenches are produced as a result of this process.