Fill in the blank (_) in the following sentence from the following choices.
Sentence: The grout around the sink was coming off, so Jennifer asked Jessica how to regrout the sink. _ listened to the explanation carefully.

Choice 1: The grout around the sink was coming off, so Jennifer asked Jessica how to regrout the sink. Jennifer listened to the explanation carefully.
Choice 2: The grout around the sink was coming off, so Jennifer asked Jessica how to regrout the sink. Jessica listened to the explanation carefully.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
2.