What is the main requirement regarding the entry of goods in Immediate Transportation?

The correct choice emphasizes that goods entering into Immediate Transportation must be released by Customs and Border Protection (CBP). This requirement ensures that customs authorities have processed the shipment and allowed it to move under the Immediate Transportation transit system. Under this system, goods can be transported from one point to another within the United States without going through full customs clearance at the initial port of entry. This process still mandates compliance with customs regulations, and thus, CBP's release is crucial for the lawful movement of these goods within the country.

In this case, other options do not address the necessary customs procedures effectively. The warranty mentioned is irrelevant to the customs process, as it does not influence the movement of goods under Immediate Transportation. Full payment requirements are also not applicable for the transit mode since it is focused on transporting goods rather than completing final customs duties. The time frame concerning the arrival of goods does not specifically pertain to the Immediate Transportation requirement, making it an unsuitable response.