How Does Rhyolite Magma Form in the Line of Arc

Multiple Choice

How does rhyolite magma form in the line of arc volcanoes like the Cascades?

A) Rhyolite is not found in the Cascades volcanoes.
B) Basalt magma rising from above the subducted slab rises to melt continental crust to form the rhyolite.
C) The subducted slab gets hot enough at depth that it melts to form rhyolite.
D) Friction at the top of the subducted slab heats the mantle to form rhyolite.
E) Water rising from the subducted slab causes melting of the Earth's mantle to form rhyolite.