Fill in the blank (_) in the following sentence from the following choices.
Sentence: Steven put spiders in Hunter's bed after learning they were afraid of them, which _ thought was terrifying.

Choice 1: Steven put spiders in Hunter's bed after learning they were afraid of them, which Steven thought was terrifying.
Choice 2: Steven put spiders in Hunter's bed after learning they were afraid of them, which Hunter thought was terrifying.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2.