Hmm.. perhaps I'll try to do these in order.

2. Muggle Studies

"I have already laid my foot down on this matter. No!"
"But Salazar, how can you possibly say this would be an invaluable subject? Godric, Rowena and I all agree that raising awareness of Muggles would be a great help to our students later on in life. Muggle Studies would prepare the children for the Muggle world and make them more acceptive of our non-magical brethren."
"We are already short on professors, we couldn't possibly squeeze in another subject. And making us more acceptive? Forgive me, my dear Helga, but it is not us who are burning Muggles in big bonfires."