How is magma created in a subduction zone?

A) Friction between the two plates causes the lithosphere to melt.
B) Subduction brings one plate to a depth hot enough for minerals in the plate to melt.
C) Subduction brings one plate to a depth hot enough for minerals to release water; this water causes melting in the overlying asthenosphere.

Subduction Zone

A region where one tectonic plate moves under another, leading to volcanic activity and earthquakes.

Lithosphere

The rigid outer layer of the Earth, consisting of the crust and the uppermost part of the mantle, directly involved in plate tectonics and continental drift.

Asthenosphere

A region of the upper mantle of the Earth, below the lithosphere, where rocks are relatively soft and can flow slowly.