Answer:
Correct answers are:
2.Setup a strong and efficient government.
4.Divided his empire among his sons to be regional rulers under his authority.
Step-by-step explanation:
Option 2 is correct as he created a functional system which enabled him to strengthen his country.
Option 3 is not correct as he was ruling only in Western Europe.
Option 4 is correct as Charles the Younger, Carloman and Pious were all important figures during his reign.