The key idea here is that a PRO number is the carrier’s own tracking identifier for a shipment. It’s generated by the carrier’s system when the load is created or tendered to them, and it’s used to locate, track, and reference that specific shipment across the carrier’s network. Shippers or brokers may provide order numbers or reference codes, but they don’t issue the PRO number for the carrier’s system. You’ll see the PRO number on the Bill of Lading and the carrier’s freight bill because it uniquely ties the shipment to that carrier’s operations. So, the assignment responsibility sits with the carrier, which is why that option is the best choice.

Signing a rate confirmation finalizes a freight move because it binds the agreed rate, pickup and delivery details, and any extra terms to a binding commitment. The carrier signs to indicate they accept those terms and will move the load, making the booking official. The document may be issued by a broker or shipper, but without the carrier’s signature, the agreement isn’t binding. The receiver isn’t part of this signing and doesn’t finalize the contract.

CIF is used for ocean shipments and means the seller pays the costs, freight, and marine insurance to bring the goods to the destination port. The seller must arrange and pay for transportation to the port of destination and procure insurance for the shipment, while the risk shifts from seller to buyer when the goods are loaded onto the vessel. This combination—covering cost, insurance, and freight—is what CIF stands for. You’ll see why this fits best here: it explicitly names the three areas the seller handles (cost, insurance, and freight), unlike other terms where responsibilities are split differently. For example, one term focuses on delivering once goods are on board with the buyer arranging insurance, another term minimizes the seller’s obligations, and another places more duties on the buyer to handle import steps. CIF’s clear package of cost, insurance, and freight up to the destination port is what makes it the correct choice.

In Shipper Load and Count, the party responsible for counting the contents at pickup is the shipper. This arrangement means the shipper verifies exactly what is loaded and records that quantity on the bill of lading, and the carrier simply transports based on that documented count. The consignee is generally involved at delivery, not at pickup, and the broker is not the one performing the physical count. The core idea is that the shipper owns the counting responsibility and documentation when the goods are loaded.