Question

Charlemagne became the ruler of Europe by

A.the sword and the cross.
B.bribing neighboring tribes with money.
C.killing all other heirs to his throne.

Answer 1

It's definitely the sword and the cross. I just took the text and the other answer was completely wrong.

Step-by-step explanation:

Answer 2

C. killing all other heirs to his throne
He originally had co-ruled with his brother Carloman after their father's death. Then Carloman died under unexplaine circumstances and left Charlemagne as the sole ruler.