Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to ship internationally [title] Check shipping restrictions. [step] Depending on where and what you're shipping, your shipment may be subject to restrictions on size, amount or weight. Some products might not even be allowed in the country you're shipping to.

Ending1: In those countries, you'll need to fill out a shipping contract with the airline to which you are shipping. [substeps] For example, in north america, american airlines currently allow international shipping. Ending2: Some restrictions are represented by a country's laws, whereas others are imposed by shipping services. It's important to check with your local postal service to determine these restrictions. Ending3: The international trade association allows for exceptions, as well. [substeps] Restrictions can affect shipment prices for some types of produce. Ending4: Some goods might be shipped to many different locations. See if any of the relevant restrictions applies to the destination.

Answer format: ending1/ending2/ending3/ending4