Final answer:
The answer is d) Land-bridge service. This route involves shipping cargo by water to the West Coast of the United States, then rail to the East Coast, and finally back on a ship to cross the Atlantic. It is used to save time and costs.
Step-by-step explanation:
The answer to the question is d) Land-bridge service. When cargo needs to be shipped by water to the West Coast of the United States, then rail to the East Coast, and finally back on a ship to cross the Atlantic, it is referred to as a land-bridge service. This route involves utilizing various modes of transportation to transport the cargo and is often used to save time and costs.