What to Do in the Forest of Werewolves Part VI

In this problem we are given that there is exactly one werewolf and that he is a knight, and that the other two are knaves. Only one of them, B, makes a statement: "C is a werewolf."

Who is the werewolf?

(Source: What Is the Name of This Book? The Riddle of Dracula and Other Logical Puzzles by Raymond Smullyan)

If B is a knight, then C is the werewolf, and is a knight. But it was said that there is only one knight here. So B is actually a knave. This means C is not the werewolf. B can't be the werewolf, because he's a knave. That leaves guess who? A is the werewolf and a knight.