Ocean Floor Subducts Under Continents Because

Multiple Choice

Ocean floor subducts under continents because

A) the ocean floor has a lower density and therefore sinks more easily.
B) the ocean floor is made of felsic minerals and is heavier than continental material.
C) the ocean floor is made of mafic material and is therefore more dense than continental material.
D) the weight of the continents is so great that they push the ocean floor material downward.
E) granite is denser than basalt,forcing the basaltic ocean floors downward.