The North Sea and the huge Atlantic Ocean were the two bodies of water that lied to the north of the Empire of Charlemagne.
Options A and B
Explanation:
Charlemagne is better known as the father of Europe. During his reign as the empire, he conquered and united vast regions of Western Europe. He is also known as Charles I or Charles the Great. During his rule, a golden era of intellectual and cultural activity emerged within Western Europe. He was called as the first "legitimate emperor" in "Europe" after fall of the Roman Empire about 300 years before him.