At the end of Shakespeare's The Tragedy of Julius Caesar, Brutus comes to regret taking part in the murder of Caesar because he learns that the evidence concerning Caesar's attempts to usurp political power was, in fact, false. He realizes that if he hadn't been faced with this false evidence, then he would not have taken part in Caesar's murder.
The best option from the list would be that "b) it completely ignored slavery," since the Founding Fathers were very much aware of the hypocrisy of talking about freedom and individual liberty while owning slaves.
