An upright vessel has negative GM. GM becomes positive at the angle of loll because the（）.<br>A:free surface effects are reduced due to pocketing<br>B:KG is reduced as the vessel seeks the angle of loll<br>C:effective beam is increased causing BM to increase<br>D:underwater volume of the hull is increased

An upright vessel has negative GM. GM becomes positive at the angle of loll because the（）.
A:free surface effects are reduced due to pocketing
B:KG is reduced as the vessel seeks the angle of loll
C:effective beam is increased causing BM to increase
D:underwater volume of the hull is increased

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