A、By grEAtly inCrEAsing thE oCEAn’s DEpth in somE ArEAs.
B、By CrEAting lArgE wAvEs on thE surFACE oF thE oCEAn.
C．By CAusing muD or sAnD to mix with oCEAn wAtEr
D．By Crushing lArgE Amounts oF stonE.