The correct answer is A) be provided with an effective braking system. The reason this is the correct answer is that the regulations governing the loading of vehicles onto Ro-Ro (roll-on/roll-off) vessels require that any vehicle to be loaded must have an effective braking system. This is to ensure the vehicle can be safely maneuvered and controlled during the loading and unloading process. The other answer choices are incorrect because they do not fully address the regulatory requirement for an effective braking system. While weight limits and securing points are also important considerations, the primary requirement is that the vehicle has a functioning braking system.