A couple of mine were wild guesses so your 9 is probably better :)
The part that surprised me the most was that the March on Washington took 2 months to organize. Logistics without computers, internet, cell phones and If the FBI is spying then it has to be pretty covert as well to get that many organizations organized. Seems incredibly inspiring.
I learned a lot from this quiz as well and think I would have enjoyed learning history with quizzes like this in school, great article on Push for Good, keep up the great work.