The main way new oceanic crust is created is by:

A) eruption of lavas and solidification of magmas at depth
B) sediment scraped off a subducting slab
C) continents that subside below sea level
D) continental rifting, before the continents separate
E) magmas along an ocean-continent convergent boundary

Oceanic Crust

The portion of the Earth's crust that underlies the ocean basins, composed predominantly of basalt and gabbro.

Lavas

Magma that has been expelled from a volcanic vent and has solidified on the Earth's surface.

Magmas

Molten rock material beneath or within the Earth's crust, from which igneous rock is formed through cooling and solidification.