The correct answer is A) Higher bulwark. A higher bulwark would not provide extra buoyancy for a vessel with no sheer. Sheer refers to the upward curve of a vessel's deck from the bow to the stern, which helps provide additional buoyancy. A higher bulwark, which is the vertical extension of the hull above the deck, does not directly affect the vessel's buoyancy. In contrast, lighter draft, raised poop, and raised fo'c'sle head can all contribute to increased buoyancy by reducing the vessel's displacement in the water.