Fill in the blank (_) in the following sentence from the following choices.
Sentence: Jason made it to puberty a few months before Christopher, so _ spoke with a deeper voice.

Choice 1: Jason made it to puberty a few months before Christopher, so Jason spoke with a deeper voice.
Choice 2: Jason made it to puberty a few months before Christopher, so Christopher spoke with a deeper voice.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.