Final answer:
The trade item allowed even after the non-exportation agreement was Cotton. Despite various trade restrictions, cotton has historically been protected due to its value to the textile industry and economic interests.
Step-by-step explanation:
The item that was still allowed for trade even after the non-exportation agreement was C) Cotton. In various historical contexts, there have been different agreements and laws concerning trade, including the Exportation Act of 1660, the Multifiber Agreement, and import/export clauses in the U.S. Constitution. For example, to protect English textile manufacturers, the Exportation Act prohibited the export of English wool but did not restrict the export of cotton. Furthermore, the commerce compromise in the U.S. Constitution protected the export crops of southern states, like cotton, from being taxed. Consequently, even in situations where general trade restrictions were in place, cotton remained a vital, tradeable commodity due to its significance in the textile industry and the economic interests it represented.