To solve this question, the user needs to be familiar with the Twilight Saga and know the author of the books.
The correct answer is:
B. Stephenie Meyer
Explanation:
Echkart Tolle (Option A) is not the author of the Twilight Saga. He is a spiritual teacher and the author of books such as "The Power of Now" and "A New Earth."
William Young (Option C) is also not the author of the Twilight Saga. He is the author of the book "The Shack."
Sara Gruen (Option D) is not the author of the Twilight Saga either. She is the author of books like "Water for Elephants" and "At the Water's Edge."
The correct answer is option B, Stephenie Meyer. She is the author of the Twilight Saga, which includes the books Twilight, New Moon, Eclipse, and Breaking Dawn.