Which statement describes an aspect of tectonic plate motion directly
caused by density
differences among tectonic plates?
A. Oceanic plates move outward from the mid-ocean ridge.
B. When oceanic and continental plates collide, the oceanic plate is
subducted.
C. Continental plates are thicker and contain older material than oceanic
plates.
D. The orientation of magnetic particles in oceanic plates changes at regular
intervals.