The title Caesar used as a victorious military commander, later linked to emperors, was imperator. In the Roman Republic, the word originally referred to a holder of imperium, or legally granted command authority.
By the late Republic, soldiers could acclaim a victorious commander imperator after a major battlefield success. This acclamation was politically important because it helped the commander petition the Senate for a triumph. Julius Caesar was repeatedly hailed imperator during his campaigns, using the title as a mark of military prestige rather than as the name of a permanent office.
Its meaning changed under Augustus and later emperors. Augustus placed Imperator at the beginning of his official name, and the term gradually became associated with the supreme ruler of the Roman state. That evolution is the source of the modern word “emperor.”
The other options describe Republican offices or magistracies: an aedile handled civic duties, a tribune represented the plebs, and a censor supervised censuses and public morals. None was the victory title that connected Caesar’s military reputation with later imperial terminology.