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.
This was the time when Islam started spreading through Africa and those who resisted it and fought wars against Islamic conquerors would be enslaved and sold. Europeans also started participating in this slave trade and would buy numerous slaves from the Arabs who would enslave their prisoners of war and who often traded with Europeans.
The following are not true:
B. He turned down Lincoln's offer to command the Union Army.
C. He served with distinction at the Battle of the Alamo.
The main way in which the English Bill of Rights influenced the Declaration of Independence is that it explicitly laid out certain liberties of the English people that the King was not allowed to infringe upon. This influenced the Founding Fathers since they felt that the king had infringed upon their natural rights.