The correct answer is D) Use manila or synthetic fiber hawsers only. The reasoning is that in a scenario with a surging vessel in a swell, wire mooring lines can be dangerous as they can suddenly snap under the strain, potentially causing injury or damage. Manila or synthetic fiber hawsers are more flexible and less prone to sudden failure, making them the safer choice for mooring in these conditions. The other options, while potentially viable in other situations, are not recommended when dealing with a vessel prone to surging in a swell, as the risk of wire line failure is too high.