Fourth Option: The pigs will eventually change the Seven Commandments.
Explanation:
Since they were pigs who reduced principles of Animalism to Seven Commandments, and only pigs are characterized as one's who are able to learn and reason, so the reader can predict that pigs may one day alter the seven commandments.
The first option (about new religion) is not correct because the rebellion of the animals is based on social and political motives. They are not going to make a new religion but just a new political and social order.
The second option (about Snowball's falling) is incorrect because it is insignificant and Snowball does not even fall from the ladder.
The third option (about animals not seeing the commandments) is incorrect because they were written large enough and high on the wall that they could be read even thirty yards away.
