The correct answer is D) Illuminated manuscripts created by the Axum civilization.
The item that demonstrates an important relationship between African and European civilizations during the classical era was "Illuminated manuscripts created by the Axum civilization."
Based on a strong trade with other reigns, the Axum Empire was one of the most powerful empires during the classical era. Located in what today is Ethiopia, this empire dominated the region from 80 BC to approximately 825. The Axium trade was strong enough to establish commercial relations with faraway places such as the Roman Empire and India.