You must shift a weight from the upper 'tween deck to the lower hold. This shift will __________.

Correct Answer: Option D — make the vessel stiffer

Shifting weight downward lowers the center of gravity (KG), which increases the metacentric height (GM). A larger GM results in a shorter rolling period, making the vessel 'stiffer.' While this improves initial stability, excessive stiffness can lead to rapid, uncomfortable rolling motions that may stress the vessel's structure.