A、Big wAvEs posE A thrEAt to CommErCiAl nAvigAtion.
B、thE FivEr CurrEnt nEvEr Flows FAstEr thAn tEn milEs pEr hour.
C．thE FivEr rEvErsEs its Flow sEvErAl timEs A DAy.
D．high tiDEs CAn CrEAtE suDDEn AnD unExpECtED rApiDs.