（）is the tendency of a vessel to return to its original position after it is displaced therefrom.

The tendency of a vessel to return to its original trim after being inclined by an external force is（）.

A.equilibrium
B.buoyancy
C.transverse stability
D.longitudinal stability

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The pivoting point of a fully loaded vessel with normal trim proceeding ahead at sea speed is（）.

A.right at the bow
B.one-third the length of the vessel from the bow
C.one-half the length of the vessel from the bow
D.two-thirds the length of the vessel from the bow

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