Can you pass a W.O.M.B.A.T?

 Magical Law

1c), carpets were banned as a flying object in part due to how easily Muggles mistook them for... you know, carpets

re: 2, Arthur Weasley wrote a loophole into that law so I don't think anyone can actually do anything about it as long as they didn't have the intent to do anything with it

3c), there were almost certainly other Muggles that saw so they need to be Obliviated, one wizard is underage, and neither should be using magic in presence of a Muggle according to the Statute of Secrecy

4b), I don't recall a separate small claims court

5b)

6 is interesting, I'd say d because it is illegal to use an Unforgivable Curse on another human but the defense could easily argue that he was trying to protect the Statute of Secrecy

7d), I doubt the Wizengamot would even get to know about it due to the nature of the Trace

8c), they come with old houses from what I've observed

9c), goblins haven't done anything to warrant reconsideration of the law

 Magical Transport

10c or e), boredom rules out Knight Bus, motion sickness rules out brooms, not knowing the basics of apparating rules out apparating, I'm not sure if 1 year olds can use floo powder

11d)

12a)

13d)

14d)

15e)

16e), probably

 Everyday Magic

17b), I don't think Disillusioning EVERYONE that comes is fun and I don't think you can make the marquee hide everyone inside it

18d) is illegal but 18b) is dangerous in high concentrations

19e) unless your name is Nymphadora Tonks

20e) would reduce the pain and swelling, so I'd go with that

21b)

 The Natural World

22d) definitely, they can guide you home

23g), just ask Gilderoy Lockhart

24c)

25 well, the Whomping Willow has protective properties if you want to call "beat the crap out of people that approach" protective, alihotsy makes you laugh hysterically, and I've never heard of Snargaluffs doing anything useful so take your pick