Which of the following is TRUE concerning the deepest part of the ocean?

A. The deepest part of the ocean is located in a trench off the coast of Japan.
B. This trench is called the Philippine Trench.
C. The bottom of this trench has never been reached by a submersible.
D. The depth of this trench is estimated at 15,000 meters.
E. The depth of this trench exceeds the height of Mount Everest.