All of the Following Statements Are True of Ocean Sediments

All of the following statements are true of ocean sediments except:

A) ocean sediments are thickest in pelagic waters overlying the abyssal plain.
B) ocean sediments can include the fossilized remains of ancient marine life.
C) ocean sediments form from the remains of living organisms falling to the ocean floor.
D) ocean sediments include the remains of ancient rocks of cosmic origin.
E) ocean sediments may be composed of chemical precipitates such as calcium carbonate or manganese.