Answer: They remove any items that were used to keep them enslaved.
Step-by-step explanation:
After the Rebellion took place, the animals drove off Jones and others. Then, their first action was that they destroyed the instruments that were used in oppressing them. Some of the instruments destroyed include whips, dog chain, knives etc.
Therefore, the correct option to the question asked is that "They remove any items that were used to keep them enslaved".