Respuesta :
Answer: D) Her husband, Percy.
Explanation: In the given excerpt from Mary Shelley's introduction to Frankenstein, we can see that she describes how she first thought of Frankenstein as a short tale, but Percy Bysshe Shelley (her husband) encouraged her to write a longer version of the story ("Shelley urged me to develop the idea at greater length"), so the correct answer to this question is option D.