Why did Charlemagne's empire collapse in the ninth century? Group of answer choices Attacks from the north, east, and south by Vikings, Magyars, and Saracens weakened it. It lacked strong political institutions to hold it together after Charlemagne's death. His successors lacked his personal leadership skills and political strength. All of the above.

Why did Charlemagne's empire collapse in the ninth century? Group of answer choices Attacks from the north, east, and south by Vikings, Magyars, and Saracens weakened it. It lacked strong political institutions to hold it together after Charlemagne's death. His successors lacked his personal leadership skills and political strength. All of the above.