Which of the following is true of Charlemagne's reign? [choose all that apply]

A- He oversaw the construction of a new basilica in Rome and named it St. Peter's

B- He expanded his kingdom into the largest empire since the Romans

C- He established procedures and positions that assured his power and authority

D- He protected Pope Leo III from the people of Rome

2 answers

I think A and B but I am not sure
A no
B yes