Fill in the blank (_) in the following sentence from the following choices.
Sentence: Jennifer was meditating in a labyrinth when Kayla stumbled upon her. _ was surprised at the sudden intrusion.

Choice 1: Jennifer was meditating in a labyrinth when Kayla stumbled upon her. Jennifer was surprised at the sudden intrusion.
Choice 2: Jennifer was meditating in a labyrinth when Kayla stumbled upon her. Kayla was surprised at the sudden intrusion.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2.