When a vessel is inclined, the tendency for it to return to its original position is caused by the __________.

Correct Answer: Option C — movement of the center of buoyancy toward the low side of the vessel

When a vessel heels, the shape of the underwater hull changes, shifting the center of buoyancy (B) toward the low side. This creates a righting lever (GZ) between the center of gravity and the new center of buoyancy, which generates the moment necessary to return the vessel upright.