At 0400 your vessel is dead in the water and in heavy fog. Your loran set fixes your position at LAT 41°12.1’N，LONG 72°43.5’W. Bottom samples are taken and indicate a composition of soft mud and shell. Your fathometer reads 40 feet. If the vessel draws 9 feet of water，which of the following is TRUE?（）

A、The bottom samples and fathometer reading prove the loran fix is reliable

B、The bottom samples and fathometer readings indicate that the loran fix is unreliable

C、The information collected indicates that the fathometer may be in error

D、The information collected indicates that the chart is most likely in error

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