The war against corruption is only starting, and the fighting is carried away by office by office, ministry by ministry.
- was carried out
- is carried on
- is carried out
- are carried out
- No correction required
Explanation: Carried out means to put ahead to, which is the correct form in this sentence. Carried on and carried away means behave in a specified way and to influnce
Another example: He carried out his plan without incident.