Explanation:

- She wondered how the magician had performed the rope trick.

- Correct choice. "Wondered" means she was curious or trying to understand the trick.

- She puzzled how the magician had performed the rope trick.

- Not suitable. "Puzzled" is usually used with "over" (e.g., puzzled over) rather than directly after a subject like this.

- She suspected how the magician had performed the rope trick.

- Incorrect. "Suspected" suggests distrust or a guess, which doesn’t fit the context of figuring out a trick.

- She bewildered how the magician had performed the rope trick.

- Incorrect. "Bewildered" is used as an adjective, meaning confused, not as a verb.