Question

how does oceanic crust move along mid - ocean ridges? away from dense crust parallel to the ridge away from the ridge under less dense crust

Explanation:

At mid - ocean ridges, new oceanic crust is formed by the upwelling of magma. As new crust is created, the existing oceanic crust moves away from the ridge. This is due to the process of sea - floor spreading.

Answer:

C. away from the ridge