Hydrogenous sediment is made up of. . . . . A. cinders and rock from undersea volcanoes. . . . B. parts of once-living organisms. . . . C. eroded continental rock. . . . D. minerals that crystallize directly from ocean waters. .
In my opinion, the correct answer among the choices listed above is option D. Hydrogenous sediment is made up of minerals that crystallize directly from ocean waters. They are produced when minerals reacts chemically with seawater.
