In the presence of external forces，the center of buoyancy of an inclined vessel is vertically aligned with the（）.

Increasing free surfaces has the effect of raising the（）.

A.uncorrected KG
B.virtual height of the center of gravity
C.metacenter
D.metacentric height

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Increasing the number of slack liquid tanks has the effect of raising the（）.

A.uncorrected KG
B.maximum allowed KG
C.virtual height of the center of gravity
D.metacentric height

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