Almost all the choices shows the superiority of the pigs over other animals except letter A. By drinking the cows' milk it shows that Napoleon are unlike other animals which are deprived to taste cow's milk and just satisfies themselves of other ordinary food and beverage like water. Then the pigs depict themselves as leaders and politicians that have higher knowledge and wisdom over the others by being like lawyers and taking charge. However, letter A is the opposite because by Snowball's choice to teach, he wants to educate other animals and let them be their own king.
