Julius Caesar does all of the following except a. declared himself king of Italy c. filled the Senate with members loyal to him, b. declared himself dictator of Rome for life d. had the Gregorian calendar created

I believe the answer is: A. declared himself king of Italy

When he took the leadership position on Rome, he never used 'King' as a title because he associate the title as someone lazy and incapable.

He is more fond to be referred to as a military general due to his prowess in creating military strategies.