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 silica and aluminum s and is heavier than continental material.
C) the weight of the continents is so great that they push the ocean floor material downward.
D) the ocean floor is made up of silica and magnesium and is more dense than continental material.