Which of the following data fields is mandatory for transmitting EEI?

The correct choice is carrier identification. When transmitting the Electronic Export Information (EEI) in the Automated Export System (AES), it is crucial to include carrier identification as a mandatory data field. This element ensures that the government can track and verify the movement of goods being exported. It serves as a key reference for shipments, especially in cases of compliance checks, audits, and monitoring export activities.

While the other data fields mentioned, such as the shipper's name, invoice number, and product description, provide valuable information for the export process, they are not classified as mandatory for the transmission of EEI. This reflects the regulatory requirements that prioritize the identification of the carrier as a critical component to facilitate effective oversight of export shipments. Understanding which data fields are essential helps ensure compliance with export regulations and streamline the overall export process.