单项选择题
Movement of liquid in a tank when a vessel inclines causes an increase in（）.
A.righting arm
B.metacentric height
C.height of the uncorrected KG
D.natural rolling period
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单项选择题
Your tanker is loaded down to her marks，and you find that she has too much trim by the stern. To adjust the trim，you may（）.
A.add ballast forward
B.load more cargo forward
C.shift bunkers forward
D.All of the above
