The Process of Backarc Spreading Occurs as a Result Of

The process of backarc spreading occurs as a result of:

A) extensive sedimentation into the backarc basin from both the continent and the volcanic arc.
B) the rifting of the overriding plate and the extrusion of basaltic magma.
C) movement of the continental plate away from the subduction zone.
D) seaward migration of the volcanic arc as it is pulled toward the trench by the subducting plate.