Studies of the Chemistry of Rocks from Arc Volcanoes Indicate

Studies of the chemistry of rocks from arc volcanoes indicate the main source of the magma is_______ .

A) melting of the subducted mantle lithosphere
B) melting of the asthenosphere above the subducting oceanic plate by fluids acting as a flux to enhance melting
C) melting of the asthenosphere above the subducting oceanic plate by frictional heating on the subduction interface
D) melting of subducted oceanic crust