Answer:
The pigs revise the rules to gain privileges for themselves.
Step-by-step explanation:
The Seven Commandments in the novel Animal Farm was given by the Old Major. With these seven commandments came the word 'Animalism'.
These commandments were followed in the farm until the pigs (Snowball and Napolean along with Squealer) started ruling over the farm.
The commandments that were followed in this philosophy were revised after these pigs came in possession of the farm after the death of the OId major. These changes in the commandments made them misuse their powers. The first commandment that they changed was the seventh one which states that all animals are equal.
So, the correct answer is first option.