Deep Trenches in the Ocean Mark Places Where

Deep trenches in the ocean mark places where

A) one plate slides under another,returning older crust to the mantle.
B) plates pull apart,leaving great rifts in the crust.
C) hot mantle material rises upward and spreads sideways,pushing the plates apart.
D) plates push together,creating ocean mountain chains.
E) plates slip sideways relative to one another.