Answer:
C. We are so grateful to you for having killed the Wicked Witch of the East, and for setting our people free from bondage.
Step-by-step explanation:
As you may already know "Wizard of Oz" tells the story of Dorothy, a girl who lived with her grandparents in Kansas and was hit by a tornado that transported her to the city of Esmeralda, a magical place full of enchanted creatures. Dorothy needs to find the wizard of Oz to get home. During this adventure, she meets many different friends and even manages to defeat the Wicked Witch of the East, who enslaved a very friendly people.
The Wicked Witch of the East was extremely powerful, almost invincible and when Dorothy defeats her, the Witch of the North believes that she is a sorceress for having managed to free the people from something so powerful.