Quidditch answers no 1

Here they come:
1) b. "He-who-must-not-be-named" and Wormtail plotting to kill him
2) a. It vanishes after a few hours
3) c. Malfoy attacked Harry when Harry's back was turned.
4) Snape
5) c. The special protection Harry received from his mother would also pass to "He-who-must-not-be-named"
6) d. 77
7) b. The Department for the Regulation and Control of Magical Creatures
8) Neville
9) a. 30th
10) a. Navy Blue