The correct answer is B) enough slack in their bight. The reason this is the correct answer is that cargo hoses must be suspended with enough slack to allow for the rise and fall of the tide, as well as the change in draft of the tankship during cargo transfer operations. Having slack in the "bight" or loop of the hose allows the hose to move up and down with the changing water levels and ship draft, preventing damage to the hose or related equipment. The other answer choices are incorrect because they do not fully address the need for flexibility in the cargo hose suspension to accommodate tidal and draft changes. Topping lifts, runners, slings, or saddles alone may not provide the necessary slack required.