The correct answer is B) VCG or KG. Vertical moment is obtained by multiplying a vessel's weight and its vertical center of gravity (VCG) or keel to center of gravity (KG) distance. This is because the vertical moment, or the moment created by the weight of the vessel acting at a certain distance from the axis of rotation, is a function of the vessel's weight and the distance between the vessel's center of gravity and the axis of rotation, which is typically the keel. The other options are incorrect because LCB (longitudinal center of buoyancy) refers to the longitudinal position of the vessel's center of buoyancy, TCG (transverse center of gravity) refers to the transverse position of the vessel's center of gravity, and LCG (longitudinal center of gravity) refers to the longitudinal position of the vessel's center of gravity. These values do not directly contribute to the calculation of the vertical moment.