As a huge fan of these books, I can help you here... BUT... I won't spoil it for you!
Mr. Brunner had the expectations that Percy Jackson should know the answers about the Greek gods and Latin, even when he didn't. He always looked disappointed when Percy didn't know the answer.
Percy though these expectations were unfair because he thinks that he is just a "stupid kid" and doesn't know anything, and can't be the perfect student. How wrong he is, I won't say.
Hope this helps! Have a great day!
Answer: I have always believed in making choices for myself. Asking someone, or letting someone chose my future isn't something i agree with. It's my future, how will i know if this person has my best interests at heart? My future career may be my permanent one, but it will also be mine. I wish to chose a college, and career that will best benefit me, and my life. If anything, I would accumulate more stress from someone choosing my career. For those who worry about what they will chose, let yourself find it. Don't rush into something or let someone chose something that will make you unhappy in the end. Making our own life choices, is within our natural born rights, just as John Locke would say "All mankind... being all equal and independent, no one ought to harm another in his life, health, liberty or possessions."
I hope this helps :)
If my memory serves my well, the reason why Squealer changes the Commandments is B. to reflect the pigs' adapting human qualities. This option looks the most accurate and, as for me, best represents the reason of change. Hope you will agree with me, regards!