Which of the Following Is Not an Accurate Statement About

Which of the following is not an accurate statement about the melting process in the earth's interior?

A) Melting of rocks is incomplete with partial melts extracted as magma and solid residues left behind.
B) Water dramatically lowers the melting temperature of silicate rocks,and addition of water commonly contributes to production of magma.
C) Upwelling flow in the earth's interior brings higher temperature rocks toward the surface and contributes to decompression melting.
D) The earth's lower mantle is entirely molten and heat from this zone produces partial melting in the upper mantle,which produces the diverse volcanic rocks we see at the earth's surface.