I have no kids, so this is all speculation on my part.
1. C
2. D - I would contact the teacher to discuss the situation and also ask if I could sit in and observe the class for a few periods (and mostly just sit there with a stern face to remind my child I was going to watch them like a hawk)
3. Loaded question

I'd like to think I would react to the initial letter. Let's pretend the letter gets lost in the mail - then my answer would most likely be C.
Did you want me to elaborate, er...speculate, any further?