Ocean crust: . is the same age as continental crust. b. is covered by a thin blanket of sediment that thickens away from the ridge axis. c. is the same composition as continental crust. d. has not been sampled directly because it is too deep beneath the ocean.

B

Explanation:

Oceanic crust is the Earth's lithosphere's outermost layer located under the oceans and formed on the oceanic ridges at spreading centers that occur at divergent plate boundaries (ridge axis).

It is covered by a thin blanket of sediment that thickens away from the ridge axis.

Oceanic crust is different from the continental crust in numerous ways. For instance; It is younger, thinner, and denser than continental crust. Furthermore, It also has a different chemical composition.