单选题A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°. Which action should be taken to remove this error during compass adjustment?（）AIf the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should add some magnets.BIf the blue ends of the magnets are aft you should lower the fore-and-aft trayCIf the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should reverse the magnetsDIf the blue ends of the magnets are forward，and the fore-and-aft tray is at the bottom，you should add some magnets
单选题
A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°. Which action should be taken to remove this error during compass adjustment?（）
A
If the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should add some magnets.
B
If the blue ends of the magnets are aft you should lower the fore-and-aft tray
C
If the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should reverse the magnets
D
If the blue ends of the magnets are forward，and the fore-and-aft tray is at the bottom，you should add some magnets
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