Trade had a significant impact on the Akkadians in several ways, but the most fitting option among those provided would be:
It spread their culture and brought new goods.
Trade allowed the Akkadians to exchange goods with neighboring regions, which facilitated cultural exchanges and the introduction of new materials, technologies, and ideas. This not only enriched their society but also helped in the spread of Akkadian culture beyond their borders. While military invasions, the slave trade, and the emergence of artisan classes may have occurred, the primary influence of trade on the Akkadian Empire was in its role as a vehicle for cultural diffusion and the acquisition of valuable resources.