Final answer:
Charlemagne accomplished diplomatic engagement with Baghdad, a revival of trade with the East, and stabilization of the realm's currency. His reign saw the Carolingian Renaissance, which promoted education and religious reform, and his extensive correspondence and engagement with global leaders of his time.
Step-by-step explanation:
During Charlemagne's reign, he accomplished all of the following: A) He pursued diplomatic ties with Baghdad, B) He revived trade with the East, and C) He stabilized the currency of the realm. These achievements were part of his efforts to reform the Church, encourage education, and correspond with various global leaders.
Charlemagne's reign is notable for his attempts to revive education through the Carolingian Renaissance, a cultural and intellectual revival that emphasized proper Latin and the correction of flawed versions of the Vulgate. Additionally, he reorganized the empire into counties and set up a system of counts and margraves to maintain order and defend against foreign invasions.
His global perspective is evident from his correspondence with the Byzantine rulers, his acceptance of ambassadors and gifts from the Abbasid caliph, and his promotion of trade. Even though his efforts to establish a bureaucracy and standing army were not entirely successful, his reign was a dynamic period of cultural and social transformation.