Explanation:

- Instigating a person to an offence: This involves provoking or encouraging someone to commit a crime. It's about influencing or pushing another individual to break the law.

- Intentionally aiding a person to commit it: This means providing help or support to someone with the purpose of assisting them in carrying out an unlawful act. This could be through physical assistance or providing necessary resources.

- Engaging in a conspiracy to commit it: This involves forming an agreement with one or more people to carry out a criminal act. It's a collective plan or coordination to engage in illegal activity.

- All of these: Abetment can occur through any of the aforementioned actions. It’s not limited to just one way but includes instigation, aiding, and conspiracy.

Option 4: All of these