All of the Following Processes Contribute Felsic Material to Rising

Multiple Choice

All of the following processes contribute felsic material to rising basaltic magmas EXCEPT:

A) melting of accumulated biogenic silica from marine microorganisms.
B) subduction zone magmas assimilate overlying crustal rocks.
C) melting of accumulated detrital continental sediments.
D) partial melting of the warm mantle above a subducting oceanic slab.