The correct answer is B) a stopper made from chain. Chains are the preferred stopper for transferring a load from a conventional mooring wire to a set of bitts. Chains are strong, durable, and able to withstand the high tension and potential sudden loads involved in this type of mooring operation. In contrast, other materials like manila line, nylon line, or wire rope may not have the necessary strength or ability to safely and securely transfer the full load. The other options are not recommended for this task. Manila and nylon lines may be too weak, while wire rope could potentially kink or fail under the high tension. Chain provides the necessary strength and reliability required when transitioning a heavy mooring load.